A father has appealed against a Home Office decision to return his son to his native South Africa after he came to the UK for a "holiday".
Philip Haycock's son, also Philip, 11, lives with his mother in South Africa. His father said he had arrived in order to spend Christmas with him in Norfolk.
Mr Haycock said his son was due to stay in Belton until April, but officials have ordered his immediate return.
A Home Office spokesman said he could not comment on individual cases.
On Friday, Mr Haycock insisted his son would not be going home until April.
'Gobsmacked'
He said: "He has his tickets legally and his holiday was arranged in the proper way.
"Everyone is gobsmacked. This was supposed to be a happy time, but they were cold and uncouth, and interrogated him, with me present."
He said his son had a bipolar disorder and learning difficulties, and the stress of the situation had caused him physical discomfort.
Mr Haycock, 48, was born in Rugby but lived in South Africa for 25 years until his marriage broke down 18 months ago.
He said he remained on good terms with his wife, who agreed for Philip to undertake the four-month visit and made sure all the necessary paperwork was in place.
His solicitor has put in an appeal asking for the immigration service to reconsider its decision.
A Home Office spokesman said South Africans visiting the UK did not need a visa, but had to satisfy officials they were genuinely seeking entry as a visitor for no longer than six months.