Worst Service Ever!

We app**** for the deal 30mbps LTE All Hour Deal @ R679.00 per month. When speaking to the consultant, he assured us that the address I gave do in fact cover 5G, so we gave the go-ahead for the contract. We received the device, set it up, and were happy with the speed and service. All of a sudden, we started having trouble connecting more than 1 device at a time, so I contacted the consultant, who referred us to a "technician" named Tshi. We explained that we cannot connect more than 1 device, and even then, that 1 device buffers continuously. After about 2 days of waiting, the "tech" responded with the instruction to remove the Sim card and use the ussd menu to deactivate roaming, when in fact it was not even active. We told him and supp**** screenshots, but his only response is "I'm currently offline" or "my apologies." On the 14th, we again contacted him, asking for feedback. He responded with "My apologies, I'll log a call," and dead silence since. No one seems to want to help us, and then when we want to take drastic measures, like cancel the line, we, as the customer is being punished. This is really unacceptable customer service. I would recommend people run and run fast when it comes to Telkom! Till this day, our speed test picks up between 0.4 and 1mbps, so what am I paying for?