Month to Month Home internet

I have been trying to cancel my month to month contract for over 3 months now. The router has been returned in store on the 24th of November 2024. I phoned in to cancel on the 25th. I phoned again on the 17th of December 2024, where I was informed to speak to a Mondo consultant, nowhere on the mtn contract or website is there any mention of contacting Mondo for cancellations. After logging the cancellation with Mondo the contract is still not cancelled. Now I have been informed that a migration have been done and they couldn't do the cancellation. No one at MTN can assist me!