MFC: Poor service, harassment and blatant ignorance!

I have been with MFC since Nov 2017. I have never missed a payment until a job change in May led to late payment. This was met with a rude, arrogant call on 30th May in which I explain situation and agreed to a debit 01 June. The payment did not go off as planned and I called to arrange myself. The MAY 2018 payment was then debited on 09 June and again on 11 June! I called and was advised to reverse the payment of the 11th, which I did. Then comes end of June: now I get debited again 2 payments - one installment and one arrears! I now call MFC - they note double payment and advise I can reverse arrears payment - which I do! Only to be harrassed by sms's and rude telephone calls of agents who refuse to look at my report correctly. So today, 12 July 2018 - I am called yet again, and told I am absolutely in arrears and I need to get myself sorted. I am so unhappy with MFC, if I could change my service provider right now, I would. I have had nothing but poor service, unprofessional calls and no insight into the fact that I have to pay for every single extra bank transaction this is causing. I wish someone at MFC would take the time, review my information and actually correct an error started by my delayed payment but perpetuated by their utter refusal to see they are now in the wrong. I have never had to fight for myself like I am now. It is sickening! I would NEVER recommend them to anyone!!!!!!!!!