Very bad service from MTN

I ordered a mifi router and paid a week ago. I have not received any feedback. After sending a email to customer service on 6/4/2024, and a promise if feedback within 24 hours, needles to say no response. I phoned 083 135 no help. I eventually got a customer service nr. Waited more than 20 min to speak to an agent, just to be told there is no stock and I must wait till stock arrives. So I asked for a refund where I was told to phone 135. I said I am not a MTN customer where he told me I must borrow someone elses phone. By now I told him I am get p.....d for the bad service, and asked his name where he then disconnected the call. I am beyond angry with MTN