********, Bad Service

********!!!! Paid my gym fee including arrears and cancelation fee in May. End of May they debited again gym fee. June, July and August 2021 didn't enough money in my account couldn't debit now I am receiving messages to pay. Spoke to Pertunia from debit collector's she says I should send proof of payment. Do I really have to keep slips from May and after making those payments I spoke to her on the phone and everything was okay.