I have an S corp We sell vacation packages and clubs. A broker put through bad deals and now we are losing our merchant account and have to pay back

This sounds very fact specific and I would guess there is more to this than what is written.  What does your agreement with the broker provide?  When is his or her fee or commission earned?  Does he have any contract liability for the "bad deals"?  In the vacation package area in Florida there are administrative regulations that might be applicable against the broker, as well as breach of contract claims.