Severe lack of customer care and support

I have problems with my voice message and call forwarding options since 2018 and need it as part of my work. To date Telkom has been able to fix this problem. I have been referred from one department to another (with 7-9 working days response time) or just receive a sms that the querie has been closed. I have to date not been able to speak to any senior manager and was informed that I can complain on social media. They are very quick to take my money every month but not able to address my problem.