Extremely UNHAPPY MTN Customer.

I received an email on the 3rd Feb 2023 from MTN advising if I apply online for the new Samsung S23 I would be one of the first to get the phone with a free S6 Tablet. After my successful online application I received a call about a week later from MTN to complete the application telephonically which I promptly did. Spent about an hour and a half with the consultant but unfortunately did not get their name. About 3 weeks passed and I had still not heard anything so I called MTN and spoke to a lady by the name of Tia who advised that there was no completed application on the system and that it had to be re-done. I spent another hour and a half on the phone going through the entire process again. On completion Tia advised she would call me back the following day to confirm if MTN could infact still supply the S6 Tablet as my online application was not reflecting. I never received a call from Tia. Two Days later I got a call from another company that sub-contract to MTN who advised me that there was no upgrade on the system. I advised them that it was definitely processed and dismissed their call. On The 9th March I called MTN to find out when I would be receiving my phone. I was told by a Bongani that my previous application was incomplete and that it still had to be finalised. I spent another hour and a half on the phone with Bongani completeing my application and was reassured by Bongani that everything was definitely done and he would call me the following day to confirm on a number I wanted to cancel and if I would infact receive the S6 Tablet with my S23 upgrade. Once again I did not receive a call from anyone at MTN. I have since phoned MTN numerous times only to be pushed from pillar to post and no way forward. On the 28th March I called MTN advising them that due to the poor service I wanted to cancel all 8 contracts I have with them only to be cut off after speaking to 5 different departments. I called again this morning to cancel all 8 contracts and after speaking to 4 different departments I was once again cut off after half an hour. I have been a customer with MTN for about 30 years and as mentioned I currently have 8 contracts with MTN. I am more than R 10 000 in advance on my payments and in all the years have never missed a payment. I have also gone into Cradlestone Mall twice to do my upgrade to no avail. Please help I am at my wits end.