Chris Bovis, 26, thought it was a joke when he was cut off without warning. Chris Bovis, from Tilbury, Essex, contacted his phone company, Orange, when they cut off his phone without warning.
The 26-year-old builder was told he had racked up a bill of £8,900 down to unusually high internet usage.
He claims the adviser then warned him his next bill was due to be another £10,000.
Mr Bovis said: 'My first reaction was to laugh as I just could not believe it but it stopped being funny when I realised they were not joking and were totally serious.'
Orange tried to take the £19,000 for the months of October and November from his bank account, only for the transaction to be blocked.
The problem appears to have been caused by a fault which meant his iPhone started sending and receiving large amounts of data in error.
Mr Bovis and his partner Joanna Russo have been left disgusted by the treatment they received, which they say even included threats to send bailiffs around.
He asked for his rogue iPhone to be switched off, but even when it was off it continued to automatically send and receive large amounts of internet data.
A bid to stop the problem by restoring the factory settings had no impact either.
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