WORST SERVICE EVER!!!!

Worst service I have ever received!!! My phone was wrongfully block due to outrages data usage. I logged a complaint regarding my data usage and a credit was received. This has been over for weeks and my phone is still not unblocked. I have spend hours on the phone trying to solve this issue and they keep referring me to another department. No one has an idea what they key responsibilities are!!! I even went into the nearest branch, still no answers. What poor service for SA biggest service provider.