You've already done harm to the shop and the girl by posting here. You also got your $100 back.

I don't have an opinion on the shop. But the girl is an amazing, open-minded WL. You knew and accepted her boundaries and still went to see her a second time.

You've actually publicly admitted to doing something during sex without her consent. In fact you had express non-consent. Your post is evidence of sexual assault.

I think you'd be in more legal trouble than the shop if you took this further. The shop would be in its rights to take your post and that CCTV footage to the police.