breach of verbal agreement

one star rating should not even be given. I made a payment arrangement with these people of R500 a month for virgin Active. my last payment was agreed to be in December 2017. In January 2018 they deducted R397.29 and I have just received a messages saying that they are going to deduct again this month on the 26th of February. firstly I would like my January debit returned to my account. and if you even think about debiting my account this month, I will have my lawyer getting in touch with you. go back and listen very clearly to my arrangement on the call with one of your consultants and when my last debit order will be. and you will hear in December. This is a breach of our verbal agreement telephonically. also, to add to that I get paid on the 26th. why track the debit from the 23rd. I want those fees returned as well as every time you try to debit I get charged a fee.