Contract cancellation

On 05 Jan 2022 I tried to upgrade my contract online & instead was given a new contract. When I contacted them to move the contract to my current MTN number I was told it couldn't be done. So I told them I want to cancel & they must fetch the phone, the phone was collected by the courier on 12 Jan. My contact is still not cancelled it's been almost 2 months, I have been calling mondo on a weekly basis for feedback & progress & everytime I get told they are waiting for the warehouse to verify receipt of the phone, how long does it take to verify that, seriously.

I have never met such such unprofessional people, even if you ask for the manager supervisor, they are never available& alwayspromise to call back which they never do. They were so quick to do a new contract but can't clean up their mess. Will never use them again, this is so frustrating