Bad service

I'm so frustrated with MWEB and their no response/feedback/lack of customer service. I sent out emails twice to Yolisa without any response, I sent messages on messenger but they keep on saying they wi get someone in Sales to contact me. I called them again today and they promised to send me the reference number but I never received anything not even a call. I just want to cancel the service on month end as Cell C is stopping their Lte service and I'm not interested to do business with a company that don't support customer service.