MTN South Africa- Revolting service

In May 2021 i signed up for a sim and data contract with MTN.They promised to deliver an additional sim card which would be free loaded with 5G data as a welcome gift. To my surprise when i received my first billing , i am billed for two sim cards which was not what we agreed on. When i lost my job i called them and asked that they cancel my contract , i also advised i was willing to pay for cancellation fees on both sim card contract. But still i didn't get any form of help - few months done the line my debt is accumulating with them, with no means to pay for this cause they refuse to cancel my contract. I got a temp job and still paid the huge outstanding amount that was in arrears also affecting my credit profile. I then called again in November 2021 when i had made laymen and requested that they cancel again no one came back to me. I am so tired of your ****ty service, you have so much disregard for your customer's wellbeing. You guys are a bunch of *******. I want my contract cancelled and a full refund for the additional sim card i didn't sign up for that i have been paying for almost a year now. For such a "Big company:" your service is revolting. I want this resolved by this week or i will keep escalating my query until i get the help i need. I am also sure your company has the call recording for when i signed up. So please do not test me any further