MTN contract router is a scan

i am very very disappointed with mtn , January 2025 i received a call from mtn selling a router i was interested and gave my address it was delivered 2 days later. when i got the router it was not working i called MTN and was told a different address was put on the router and my area did not have 5g coverage which was confusing because why was it put on the wrong address but delivered on the right address clearly the consultant wanted a sale. i returned the router at MTN East Rand mall received an IRMS and was told to contact the online team for cancellation did that and was told cancellation takes 30 working days and i was debited for 2 month, after 30 days the contract was cancelled . February 2026 MTN debited on my account R 1297 and R1876 when i queried i was advised it was for the router i had returned advised the router was returned but i was told it was not logged on the system . The following month another R1296 20 March 2026 was debited after had went to MTN East rand mall and was assisted by Mariete who said she had opened a case after multiple tries to contact her for feedback but ended up getting no feedback. 20 April about R300 was debited again . i dont know what to do when i call the contact centre 135 im told to contact online team and when i contact them they advised me the contract is cancelled on their side and they dont know why MTN debited me i must go to the shop i returned it and when i go there i am told it shows on the system u returned the router but i have not gotten help in almost 3 month now . Bring back my money