Wrongly subtract payments from my account

Supersonic G.F.Henning My Account No.: S***

03/05/21 Send a letter to *** to cancel my subscription for the end of May 21 24/5/21 Follow-up on my request with another e-mail 01/06/21 Write an e-mail to *** to query why they still deduct money from my account 5/08/21 Write a e-mail to *** query why an amount of R1,020.15 were deducted from my account 20/07/22 E-mail to Temba Boitumelo [ MTN South Africa ] *** to query why my account was billed 31/05/31 with an amount of R1,404 and 30/06/22 again with the same amount 20/06/22 Boitumelo requested a detailed bank statement which I send on 25/07/22 13/09/22 I followed up on the status of my request from Boitumelo 24/10/22 I have not heard from them and therefore followed up with them again with an e-mail to Boitumelo 24/10/22 I received an e-mail back from Boitumelo stating the following Good Day, Hope this finds you well, Our billing department just sent me your statement which shows that the account was debited by debt collectors of which it got corrected, so you not due for a credit. Please check the highlighted part on your statement.