Faulty Pocket Router Case number #***8

Telkom is the worst network service provider ever!!!! At the end of March 2020, i took a Contract - SmartBroadband Wireless 20GB (+20GB Nightsurfer Data) TopUp with Huawei Pocket Router for R239. Almost double the amount has been debited out of my bank account ever since. The most frustrating thing is not getting or being able to use the other 20GB Nightsurfer Data which was part of the contract. None of their technical guys have been able to solve this problem and my last logged case #***8 (27 May 2020) is still pending, no solution yet. How am i expected to pay double the amount of the contract when i am getting half the service??? And i was told i cannot terminate the contract!! What??! Is this even Legal?? Paying double the amount for half the service? Can someone please look into this urgently!!!