why not try a different sportsbook?
If the Op is a real one then I think the user will be limited if the user started on a new site. Usually who plays and is limited the person become limited for the same reason and I think the bet figure is impossible.
OP can always find a workaround to keep gambling. If his name is already restricted on major sportsbooks, he could ask trusted people to register on his behalf, skipping the forums and going directly to people he knows so he can explain everything. It sounds a bit suspicious that he’s been limited on popular sportsbooks, but for the sake of discussion, that’s the only suggestion I can think of right now.