Poor Telkom Connection

I say in Johannesburg and have a Lte Sim contract with Telkom. For months I have been struggling to get a stable connection. The signal is up and down all day long. Sometimes disappearing. They have sent technicians to my house, and then told me that my router is the problem (I work from home, so have multiple devices running) So about 2 weeks back I went and upgraded my contract and got a Telkom router. Now the signal feels worse. If my son is playing on the Xbox, I cannot even watch TikTok, because then it kills the signal. I am now paying more, but still getting less I am genuinely so tired of struggling just to get what I pay for :( I am tired of rebooting and moving routers around. As a single mom it hurts even worse, because my kids don't even want to visit me, because "mom's wifi is ***". Wish the big companies will just thinking about their bottom lines, and actually care about customers