Telus Internet keeps disconnecting - Technicians can't find out...

[wireless]

Hello,
I am using Internet 25 - 2 mbps and 300gb data.
I'm using it for just typical home use.
After 4 months of use, my internet keeps disconnecting.
It would typically disconnect every 30~45 minutes for about 15~20 seconds.
Even when it's connected, during bad days, I would get 8 mbps for an hour with ethernet connection.
Wifi is just... awful. I tried changing the channels as well - didn't help.
My TV and cable is perfect. It's ONLY internet.
I had three technicians come at different times, and all they do is either change the router or keeps testing the speed until it's good, then they leave.
None of those incompetent technicians were able to resolve this issue.
Can someone please help me?


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