Cell C customer service is shocking

Won a R5000 voucher on 28 November 2020 and have called them 4 times to claim the prize after i claimed it on the app. Call center phoned back once to give me a number to call to sort problem two calls and three days later still no feedback or voucher. Cell C also changed my plan without notification and after telling me it is because the plan no longer existed i found out that it still does just at a higher price. I spent more than 5hours with the call center with no solution. I was advised on the top-up upfront package Cell c moved me to i can no longer buy voice bundles and moved to prepaid. Could not buy voice bundle on credit card, after many calls and no feedback i then figured i have to buy airtime and convert it which was different from my previous package but the call center could not assist