Sell phone contract

Good day Vodacom 4 u, George garden route Very bad service Since 23 Jan I have been trying to upgrade on my contract. First thee was a problem with my profile, they said I'll call you back never happened. I went back in on 25 Jan 2022 the guy who helped me wasn't there then someone else helped me couldn't see that the other guy did anything. He said he will phone me back on 26 Jan 2022 up and till now nothing. If I phone no one awnsers the phone. I thinking of canceling my contract at vodacom. This is very bad service