Are there any outages ongoing? i can't seem to connect using wifi except for facebook, youtube, and google.
Have you re-started your modem?
Accessing some sites, but not others usually indicates the Domain Name Server (DNS) is the issue. Since this is outside your control, you can wait a while and see if it self resolves, or you can change the settings in your Modem so the DNS points to another DNS. Google maintains a DNS at 188.8.131.52, and there is an open source DNS at 184.108.40.206
I checked, restared my modem. some channels are also not accessible at this time.
Then contacting Telus seems to the the next logical step.