Michael Turner is jointly accused of fraud in Hungary
The family of a Dorset man who was extradited to Hungary say they are concerned about his welfare in prison.
Michael Turner from Corfe and his business partner Jason McGoldrick are accused of fraud following the collapse of their Budapest marketing company.
Mr Turner's family say he is being kept in unsanitary conditions and has no access to a phone or mail.
Mr Turner flew to Hungary on 2 November after being extradited and his family have not heard from him since.
Mr Turner's father, Mark, said he had been assured his son would be allowed to phone home.
He said: "We were expecting a call on Monday so by Tuesday when nothing had happened we realised they would not be keeping to their word. What they said was clearly not going to happen."
Mark Turner said the British Consulate had no record of the case, but a Hungarian lawyer hired by the family managed to trace the men to a prison where they were being held without charge.
The lawyer, Dr Andras Pakay, said: "There are washing facilities in the cell itself. They have warm water twice a day, in the morning and in the evening, but they can shower only once a week."
The men's problems began when their Budapest-based company collapsed with debts of £18,000. The Hungarian authorities allege the company's creditors are victims of fraud.