The disgraced former Fifa vice-president Jack Warner claims he was personally given the money to build a £4m centre of excellence in Trinidad in return for helping Sepp Blatter's election as president of the sport's world governing body.

Warner has produced letters from Blatter's predecessor, João Havelange, apparently showing the $6m Fifa loan for the centre, built on land owned by Warner, had been converted into a grant. In return Warner says he delivered the 30 votes needed for Blatter – at the time "the most hated Fifa official" in Warner's words – to beat Lennart Johansson for the Fifa presidency in 1998 and named the centre after Havelange.

Warner, who quit football following corruption allegations and this week resigned from the Trinidad government after an audit by the North American governing body, Concacaf, raised questions about the centre of excellence, said in a statement: "Blatter was Havelange's candidate to succeed him for the Fifa presidency. Blatter had been at this time the most hated Fifa official by both the European and African confederations and without my Concacaf support at the Fifa elections, Blatter would never have seen the light of day as president of Fifa. I told Havelange that, through him, Blatter will get Concacaf's total support."

Warner delivered 30 Concacaf votes for Blatter in a block – and he beat Johansson by 111 votes to 80.

He claimed the centre of excellence was never a Concacaf asset but had been "a gift for the Caribbean and Jack Warner".

"So there was no ambiguity," said Warner. "There was no uncertainty. There was no secret in my dealings towards with Dr Havelange and the centre of excellence. So the centre of excellence was built, first by a loan that was given to Jack Warner that was converted into a grant, and by further assistance from Dr Havelange after whom I named the centre."