MTN Unacceptable service

I recently renewed my contract it it was the worst experience at MTN I ever had after being a loyal customer for over 10 years this is disgusting service, firstly it took over 4 hours to renew my contract, secondly i took a promotion Samsung S20 with a Tab,and i can receive a R2000 cash voucher this was November 28th 2020, with countless attempts to redeem my voucher no help from Samsung or MTN, i also sent my IEMA number to the summer promotions they told me my IEMA number was invalid and they checking with Samsung and was told to follow up in a week, every week i called and was told its still pending with Samsung after 3 months of trying I was told the promotion has ended and i cannot receive a voucher, how is this fair when it was a fault on MTN's side, why could my IEMA number be verified as when i looked it up it gave me all the details of my phone, this is unacceptable and i will be cancelling my contract with MTN after this and going with Vodacom or Cell C as this is disgusting service, never have i ever had service like this from MTN in the past 10 years and its sad to say they are losing a loyal customer as they dont know whats going on within their network if you going to have promotions make sure you state everything as i even have a leaflet stating that i will receive a R2000 voucher.