MTN False advertising and Horrific Service

So I used to have a contract with MTN which I was paying about R579 a month which I cancelled when the contract ended as I thought why upgrade rather go to prepaid and save money. I then started getting problems with my phone in December 2023 so I decided let me rather take the upgrade. I was now classified as new customer which is fine but the had to do a brand new application. I was approved but I could only get a contract for R525 which is lower than I was paying them for my contract of 2 years. The device was first advertised for R549 and then while doing the process they said they advertised it wrong and the new amount is R649. I fought this and they brought the proce down to the original R549 of which I don't qualify because I can't afford an extra R24. After going back and forth for 2 weeks they don't wanna budge and still continue to say I can't afford an extra R24 a month. The service from both the Umhlanga Oceans Mall and King Shaka Airport was horrible in assisting me and honestly I think they just didn't wanna give me the device because the advertised it incorrectly and now they don't wanna lose out based on their mistake. The are honestly to the worst network service in SA and people should stay for away from their horrible service and blatant theft om SA customers