Sim Swop/ Cancellation difficulties

Dear Mtn, I have been contracted with you through Mondo for approximately a year now. On the 09th of December 2022 I lost my contract data sim card. I have made multiple attempts to reach you via telephone and email to the point that I have now emailed your complaints email address. I have been trying for approximately a month to get assistance on how to perform a sim swap so that I am not paying for a product i do not have. I was told 2 days ago that I would be contacted and assisted I am still waiting. I have called you multiple times only to wait on hold to speak to an agent and have the call drop after waiting on the line for 10-15 minutes at a time. I am at the point where i no longer want a sim swap but i want to cancel.