Telkom blacklists MTN phone

On Wednesday 18 August 2021 I woke up to my phone not working. I use MTN so I called the customer care and they informed me that Telkom had blacklisted my phone. This is a phone I received from MTN using a MTN sim card so I was confused as to how Telkom was able to blacklist my phone. I was informed that it could be a finger error from Telkom side. The customer care from MTN then gave me a ticket number with the *** and the matter has been handed over to the ***** division of MTN. I then called again on Friday to enquire about my phone being unblacklisted and was informed that I need to try again on Monday as the customer care lady couldn’t assist and I could not contact the ***** department directly. Monday I call back and then was told I need to get an affidavit and Id send it to MTN and they would unblacklist my phone. I was asked to stay on the line and the customer care lady then said I need to go to Telkom and have them unblacklist the phone as they could not. I went to Telkom and was told I need a letter from MTN proving that the phone is mine and is a MTN phone then I would get the blacklist removed. Today I went to MTN to get this letter and was told there is no such letter that they can provide. I was sent back to Telkom in Mall of the South and they requested a click to call service. To date not MTN or Telkom has assisted me with the blacklisting of my phobe which is not lost or ****** as I have it in my possession and have not requested any network to blacklist it. Please help me as I use my phone for work.