MFC Harrasment and no help offered

I get harassed dialy by MFC. I have made a payment plan with the one lady (who stuffed up, also admitted by MFC). I had to phone in last month two times to check why my debit order never went off. She said she would phone me back on the Friday, nothing! Eventually I spoke to a lady named Rene, who has been trying to help me sort out the mess the previous lady made. I have been struggling with very bad secuizes and have not been well and unable to work. I have sent my Dr's letter as requested stating that he is treating me and I'm on heavy medications. RK Kan government hospital have lost my medical folder. I am a business owner and am not supposed to be driving. Everytime I phone in to ask questions or see if Rene is available, the phone is put down on me. All I want to know is: is my normal debit order of R2600 coming off this month on the 15th? I will eft the balance owed when I get better and working properly. Also the amount of phone calls a day is harassment, expecially when I'm trying to work. I have advised MFC to phone after 3pm. They just don't listen. I need to talk to someone who actually knows what they are doing and can help, instead of making the problem worse.