Finchoice is not my choice in the future

Finchoice double debited my account in February. I reversed the one debit. All seemed fine. Until the 10th of March when Finchoice put my account into arrears as they claimed I requested a reversal of my debit order on this date. Funny thing is, this does not reflect on my bank statement that I received the funds from the so-called reversed debit. I have sent them bank statements proving this. My cellphone account from the constant phoning and being sent from pillar to post is over R300. They continually tell me to phone Absa as it is their fault. When I phone Absa they say it is Finchoice who are in the wrong. NOW this morning the 24th of March, not only is my account in arrears because of this error, it is deeply in arrears as they tried to pull a THIRD debit. They refuse to help. I am the one who is trying to sort this mess out. Am i not the customer? Why wont they help?

Laura