Mr and Mrs Cuervo

I paid for summer camp the fees assigned they sent me a bill at the end with a total different amount. I reached out to them showing what I received was different from what they are charging. The said it was valid because I only paid a regristration fee when it clearly stated tuition. I sent screen shots email copies etc and they did not respond and attempted to process charges. I wrote the BbB and they won’t even respond to them.