Did you sign a contract with HEADS? What does it say? A signed contract is binding (sorry, the paralegal in me is coming out). You can bolster your side of the story with your receipts for your out-of-pocket expenses (vet bills, etc.). Make copies of everything. Keeping quiet and hoping they'll go away probably won't work and can backfire - these HEADS people sound like they're not playing nice at all; all they want is their $$. If they have a signed contract they can and probably will come after you either directly or through a collection agency. Take the high road on this one: be up-front and bring your documents with you; keep Lil Eli safely behind locked doors! Let us know what happens.