Too Incosiderate and Do not Care about their Customers

Had a Sim Card Contract with MTN and i cancelled it in March after getting a Final demand letter with the amount to pay including Cancellation Fee. All was paid on the 8th March 2021 and POP sent to MTN. Till this day MTN still keeps on debiting my Account,for what i am not sure. I had endless fights with MTN regarding this to be cancelled but unfortunately i have not been winning.The last REF GIVEN WAS : *** On cellphone ( *** ).

Victoria ***