@Arezoo19 - same issues ...
This is a "user-to-user" forum, not a direct path to Shaw Support.
Contact Shaw (online-chat or telephone) and get the technician to remotely connect to your modem, to view "signal-strength" and other values.
That "fast.com" server is an external (non-Shaw) site in the USA, about 8 "hops" on the Internet away from my computer. So, there is lots of chance of "latency" between your/my computer and that server.
Instead, what quantitative values do you get from running the Shaw SpeedTest, which connects to a near-to-you server within the Shaw network?