Cell C support team provides no solution to my problem

I've been a Contract subscriber to Cell C for over 20 years. Recently I could not use my paid-for WiFi calling option which I am hugely dependent on. After waiting more than 3 months raising the issue and visiting the support branch, sending emails and making calls, I was still not able to get a fix to my WiFi-Calling problems by the Cell C support crew. I felt so frustrated and disappointed - even more so when the provider promised excellent customer service and support but didn't deliver. I hope they can up their game and provide better customer service because it is a huge factor in choosing the mobile service provider that one goes with. I am even considering porting all my Contracts to a different provider.