Frustrating experience and terrible customer service

Ive had a complex issue with data on my shared SIM running out even through there is data available in the multi-sim account. Have had 15 calls with Telkom, emailed and every time just get a standard response like 'have you tried turning on your roaming?' One very helpful person in Cavendish shop but who tried everything in his power but ran out of ideas. I NEED SOMEBODY WHO CAN LISTEN TO MY ISSUE AND MAKE IT THEIR MISSION TO FIX IT