Exactly "The gym told me that it was her responsibility to cancel the membership herself, I told them that they were the ones who cancelled on her. Basically the conversation went in circles." Why go in circles when she can simply call herself and fix the whole thing? It seems like they accidentally recharged her. A technical issue like that is easily fixed, there's no reason why she can't call on her own behalf and her sister probably doesn't have the right to cancel her sisters membership. Premium coddling right here.