Telkom Mobile please resolve my problem as soon as possible

I would like Telkom Mobile billing to contact me URGENTLY to resolve the billing issues I have and have had with my account since December 2017. I have spent countless hours calling Telkom many times trying to resolve my issues using your 081 180 number and speaking to various call centre assistants who have tried to resolve my problems but don't have the ability to actually fix the problem and I you aren't able to speak to anyone in billing. I have a billing disputes case number and have been promised to be called within 72 working hours since January 2018 but to this date I haven't had any calls from them, despite calling and requesting updates etc. I signed up for a SmartBroadband Wireless 20GB with the double data special (i.e. 40GB day and 40GB night bundle) for R449 per month in November 2017 but have not had the correct billing app**** since the start of the contract. To make matters even worse Telkom have overcharged me and now have seemed to add an additional data bundle which I am also being charged for. I have just received another bill stating I owe more than R1000 when I haven't been refunded for my previous account errors which i have been overcharged the incorrect amounts which are just deducted from my account. I feel I have absolutely NO control over what is happening with my account. I would NEVER recommend Telkom based on this really terrible service and as I am sure one can imagine I am more than frustrated as I cant resolve these issues despite wasting hours of my time and money, not to mention energy on the phone speaking to people who are not able to fix my problem.