Vodacom, please solve my problem!

I have been a customer of Vodacom for many years and during that time experienced small problems, but nothing hair-raising … until now. I upgraded my contract in October 2018. Since then I've not had the joy of fully using the package I am paying for. I've made many calls, initiated many service requests, and although small compensations were made along the way, THE PROBLEM IS NOT FIXED! I even went to their technical centre.

The allocations according to the package is made on the first of each month, but the "allowances" disappears within a few days somehow. One person tells me that he can see on the system that I did not receive what I pay for, whilst another let me know that I've received everything that I should have. I get promises of call-backs which mostly don't happen and you have NO WAY OF CONTACTING ANYBODY EXCEPT THROUGH THE CALL CENTRE! Just try and look for an email address, or a manager's phone number, or a complaints number or something - none! It's been 8 months and I'm pulling my hair out of my head. How do I get this resolved?????