MTN

I've had a contract with MTN for twenty- something years. My last contract concluded on 11 February 2025. The next day, on 12 February, I visited my MTN agency and informed them that I do not wish to extend my service agreement; that I wish to retain my cellphone number, but proceed as a pay-as-you-go consumer using any provider of my choice. Today is 14 April 2025; I still cannot get MTN to port my number so that I may use Air Mobile or Capitec Connect. They keep obstructing my requests. I feel like a hostage; I wish to retain my cellphone number. It's become part of my identity. I don't know what they stand to gain from holding on to it. If I owed them money it would justify their reluctance, yet that's not the reason. What now?