Unauthorised debit order and other issues

I am so fed up with Bonitas' *********** staff! I was retrenched in July 2015 and since then I have only had issues with you guys. First of all, I made it clear that I wanted to maintain my medical aid. You then automatically cancel it! After a while, it gets re-instated and then gets suspended twice!!! Bear in mind that I made contributions out of my own pocket of R2900 via EFT. I arranged EFT with you, because on two previous occasions you've deducted incorrect amounts! I then get an sms last month stating that R7600 will be paid to me and they're busy processing it, which I immediately call in to your call centre to tell them not to do it, because I am liable for the costs. I even followed up with an email after the consultant said she was going to send an escalation and guess what?? two days later I get R7600 deposited into my account!! For what? For me to be suspended again after you realise your mistake. It took you a week to realise that you were at fault and then I was emailed to pay back the money (which I did immediately). Yesterday I paid for Dec - R2950 and now a debit order goes off today!! DO YOUR JOB PROPERLY AND PAY BACK MY MONEY!!!