Ofcom has launched an investigation after it emerged a popular ITV show hosted by presenters Ant and Dec ripped viewers off. The Deloitte Review said applicants for the 'Jiggy Bank' competition in the Geordie duo's popular Saturday Night Takeaway programme had no chance of being selected. It emerged the location for a giant pig full of £1 coins was meant to be nominated by callers to the programme and then selected at random. But in reality it was chosen weeks ahead with a shortlist of entrants drawn up. Other ITV shows targeted for ripping off viewers include Gameshow Marathon and Soap Star Superstar. Ant McPartlin and Declan Donnelly said they had not been aware of the phone-in scandals and are "extremely disappointed" by what had happened. McPartlin said: "We'd like to make it clear that we had no idea these problems existed. We have been fully supportive of this review and are extremely disappointed to discover that these irregularities have occurred." He added: "We fully support the changes that have been made within the programme as a result, and we're 100 per cent behind ITV's decision to reimburse all the viewers who were affected." Donnelly added: "The Saturday Night Takeaway viewers are of the utmost importance to us and although we had no direct involvement in the phone line process, Ant and I are now reassured that strict measures have been put in place to ensure that these kind of incidents can never happen again." Following a damning report into premium rate ITV phone-ins, the Deloitte Review found around 10 million calls were affected by the premium-rate blunders and a total of 8.57 million callers are now eligible for refunds. ITV will have to pay £7.8 million in viewer reimbursements and the total cost of the clean-up - including phone-in problems at GMTV - will come to £18 million. An Ofcom spokeswoman said: "ITV's review of its premium rate telephone services has identified a number of serious issues in the conduct of votes and competitions in its programmes. "These appear to raise serious questions for Ofcom (under its Broadcasting Code) as well as PhonepayPlus - the premium rate telephone regulator. "Ofcom will be investigating the cases which have come to light today and has requested further information from ITV." ITV bosses have promised that money will be repaid and cash not collected will go to charity. Chairman Sir Michael Grade admitted the review of ITV phone-in competitions identified a "serious cultural failure" within the company. Sir Michael said he accepted that the report would make "deeply uncomfortable reading". "My overall conclusion from the review is that there was a serious cultural failing within ITV," he said. "It is only by understanding how things went wrong in the past, and being open about them, that we can be sure that we get them right now and in the future. "The purpose of the review wasn't limited to flushing out the problems and learning the lessons. We have used it to assess viewers' losses, so that we can reimburse them." Sir Michael said the investigation process had been "painful and costly" and he apologised to viewers, telling them: "Let me say, on behalf of ITV, that we deeply regret what has happened and how sorry we are for breaking trust with our viewers." However, despite his "zero tolerance approach" to audience deception, no one is expected to lose their job. Sir Michael said there had been no "witch-hunt" - instead, staff were encouraged to come forward with their concerns. He added: "I am absolutely sure that there isn't a person working in or for the company who doesn't understand now where and why it went wrong. "And everyone also knows that a line has been drawn, and that there will be no excuses for ignoring it - the consequences will be severe. "Now we have the processes in place it will be a case of one strike and you're out. That's how we will rebuild trust." One of ITV1's most popular shows, The X Factor, opens its vote lines on Saturday and Sir Michael promised: "We are absolutely confident it will be clean as a whistle as a result of the Deloitte process. "We expect massive voting this weekend. It's the public appetite that drives this."