Cancled contract in January 2017 and still getting billed

Hi

I was an existing customer that canceled my contract on the 8th Jan 2017 and moved to prepaid. I have confirmation of this. Since then I have been billed (R1190 March, R1978 March, R1195 May, R74 Nov, R1950 Nov, R3225 Nov) That is a total of R9613 this year.

Since May 2017 I have not been in South Africa and no longer in possession of the Sim card. I have emailed every email I could find of MTN on these dates (26/07, 28/07, 1/08, 3/08, 4/08, 26/09, 7/11 and 8/11) and still have had ZERO reply.

I have called them a total of eight times from the UK costing me a lot of money each time. Each phone call said that it has been resolved but then a month later I get another debit order. I have copied in ABSA to stop the debit orders but they still keep coming.

I have no idea what to do, I have started copying in the commercial crimes unit into the email chain as well as ABSA ***** department but this has had not effect.