POOR BUSINESS PRACTICE!!

I took up an educational plan with Old Mutual in June 2018, to my surprise in December 2018 my debit order bounces due to an 'Debit Order' that i supposedly took up and signed for which was for R 1200.00, I then contact Old Mutual and request them to send me the proof and confirmation that I had the policy taken up, mind you I was charged two 'magtape unpaid fees' for my scheduled Debit Order and the one they claim I had taken up, so that in total is R 200. The request for either the docs signed or call recording was on 2018/12/21, they advise that I should send signed and dated letter to request for cancellation, I do so on the 24th of Dec and they respond saying the turnaround time is 48 hours to get back to me and to get the letter the consultant advised it takes 3 working days and 10 days later excluding holidays I'm here stuck. I've been contacting the call center speaking to different people on each occasion, sending me from pillar to post and giving me different procedures. 'till this day there has not been any concrete feedback except for the auto reply's each time I send an email and no call back. my credit score is now negatively impacted, the actual d/o did not run, and two hundred rand charged to me for a debit order I do not know of and no one is taken accountability and the 'Treat Customer Fairly' component is not practiced at Old Mutual I'm afraid. I'm so thoroughly disappointed at the service.