Poor service, debited money contract expired

Good day Iam not happy at all with mtn services. I canceled my contract long time ago because it was out of contract mtn has been charging me for the last 5 to 6 months, i have sent emaila regarding thos issue. SEE ALLCOMUNICATION BELOW THAT I FORWARDED TO YOU NOW. ID INT HAVE MONEY IN MY ACCOUNT AND I WAS CHARGED R100 ON DEBIT ORDER THAT DECLINED AS I DONT EXPECT ANY DEBIT ORDER ON THE 4TH OF THE MONTH. If you could provide me with your supervisor /manager /any of mtn staff who overseeing call Centre agents /CEO with direct contact in form of email or land-line number or they can contact me directly or via email. The reason um asking for this is because i keep on paying money and when i email reporting this issue its not resolved. This has been going on for months now,. Regards m dube