Terrible servise

Doing sim swap with mtn is a headache. I was advised to fax supporting documents as i failed to answer security questions correctly. I faxed and called mtn call centre to confirm if they received the documents the agents was just useless. She asked me to wait. When i asked her a simple question if Mtn received the supporting documents yes or no she told me she could not tell me. But i faxed in the morning how am i suppose to know if they received the said documents. How come Mtn call centre cannot pick up if faxed documents were faxed or not. Im angry as this sim card i use it for important staff. If you want me to port to another net work just say so