Bad Customer service

On the 26th of December I lost my phone at night and the 27th I went to report it at police station, then they assisted me with affidavit to go make a Sim swap at MTN retail.. I was assisted by a consulant at MTN schweizer reneke who told me they have network problems, they adviced me to leave my ID copy and affidavit and return the following day, I returned on the 29th and the consultant told me they can't assist me and gave me attitude and advice me to contact MTN directly as they can't assist me because they too busy. They sold me a sim card at R10 and adviced me to call MTN myself. When I call 135 it keeps saying they experiencing a high volume of calls till today n I really need my old number, Can I please get assistance . My alternative number is ***. The number I want swim swap on is ***