Can't keep their word

I got a call from one agent from Mondo in November 2022, selling an MTN contract which was none existing claiming it was a black-friday special (he said it was R99 for 30 gig with a router and I will not pay anything for cancelation). 3 days after agreeing to the contract, the sim was delivered but the router was not in the package. I called to find out why and I was told to give it time as the router usually gets delivered couple of days after the Sim card. So I waited for additional 3 days. After 3 days, I called the call center and to my surprise, I was told that the contract which I got did not include a router and it is actually R199 pm. I immediately launched a complain and they escalated it. I was pleasantly surprise what I got a call from Mondo saying that the investigation was in my favor and the contract will be canceled and I will not pay anything.

A month later I got an email from mtn saying that I have an outstanding bill of R199. I ignored it thinking that Mondo will do the payment as promised. I that getting these emails more frequently and the amount was increasing. I called Mondo, and I was told that they still have to pay MTN and they sent the request to their finance department. I kept getting emails from MTN and I kept calling Mondo, I kept on getting the same response. Until today (28 Feb 2022), when I call the call center, I am told that it is in the Finace department, it will be processed by next week. Every week, I am being told next. I am so frustrated. The account is currently reflecting in my credit record and I can't get any jobs as it is. Very inhumane and unconsiderate. I wouldn't advice anyone to go with Mondo. When things go wrong, they will leave you hanging.