Complaint Ref ***6

So I finally decided to get Wi-Fi for my home, Got a data plan from Telkom 3 weeks ago. First night home me and my wife tried it out, worked great. Just connected our cell phones. No other devices was connected. We went to bed around 22:00 and the next day our data was gone - over 7GB of data. I realized I left the router on, immediately checked our phones, no updates done through the night. I called Telkom, lodged a complaint for them to investigate. Most of data went between 00:00 and 03:30. Even if some apps on our phone auto-update - can it be 7GB. I asked Telkom to please look into this. I was told it takes 2 working days - it is now 2 WEEKS - NO FEEDBACK, SMS OR EVEN A CALL. 3 Weeks with Telkom and already receiving the worst possible service. Should I still port my cell to them???