The X Factor producers deny that a phoneline blunder almost cost singer Ruth Lorenzo her place on the ITV1 talent show.

The Spaniard found herself in the sing-off on Saturday after her voting number was shown with a digit missing. Ruth, 25, was forced into a sing against Girlband before going through to the next round.

But on Wednesday her friends and family were furious about the phoneline error, which meant that at one stage viewers were given the wrong number to vote for her – and many fans couldn’t get through.

Ruth’s mum Eva said: “We tried for an hour and a quarter, but the lines were busy all the time. Then we suddenly realised the number shown on TV was wrong.”

But an X Factor spokeswoman dismissed the significance of the mistake. She said: “During one short sequence, a single digit was missing from Ruth Lorenzo’s vote number.

“The incorrect number, was on screen for less than three seconds, and this was accompanied by an audio announcement giving the correct number. The error would not have changed the outcome of the vote.”