Poor Wi-Fi Connection

I use to speak very highly about Afrihost, I had taken up a contract with them for Uncapped 50mbps Pure LTE, since I started working from home. My brothers were also convinced based on how highly I spoke about Afrihost. They also have a contract with Afrihost. This a separate contract to mine but from the same household. Nevertheless the problem with poor connection started eversince I received an sms from Afrihost advising us about MTN doing an upgrade in our neighborhood. The connection has been very poor since the upgrade. It reminds me of the trauma when we were still under RAIN. It all started so great, until it went plummeting down. Bear in mind, I work from home full time, I need to have good if not strong Wi-Fi. But lately it is neither or. Especially over weekends and in the evening. Even now, I'm using my Telkom phone data, as the Wi-Fi connection is unstable. My brothers are also facing the same issue with their Wi-Fi connection. We pay so much for Wi-Fi only for me or us winding up using our phone data. What are we paying for when our Wi-Fi connection is limited. It actually feels like it's now capped. Exactly what we experienced with Rain network. I really need this to be sorted as soon as possible. I might have to cancel my contract and get a deal through Telkom, rather the devil i know. My productivity at work is affected by this, and i have run out of excuses to tell @work whenever I'm not able to join a Teams meeting through my Laptop, instead I use my phone, using my data.