All your bets were placed on matches with abnormal activity (matches with a predetermined result) and our provider canceled them so your account will be closed after you withdraw your last deposit, play fair and you will not have problems with payouts
Why can't he withdraw but his latest deposited amount (which,
by chance, is the smallest one)?
If the provider has, indeed, found that those matches were fixed then you should void the bets and return the stakes to the customer's balance.
Sorry to say this, but letting him withdraw only the latest deposit and confiscating the remaining doesn't look good. It looks like you are trying to take advantage of this situation, as yahoo suggested above.