While I understand both sides I don't think the book can argue him being limited previously is a right to refuse to pay. If they had voided the bets before the match then okay but once game has happened, thats a freeroll. You can argue to pay a portion of it but it still does not look good. $500 of $7000 is not good enough though as Heritage would have never refunded him if it had lost. This isn't my role but I'd say $4-$5k should be paid here, as if he had rebet it and odds changed accurately, probably would have been something around that for the payout. Really should pay out the bet and ban the bettor.