We have done that too. Hopefully it will work next time.

I just use a secondary phone/email for arrivecan - that way no notifications or phone calls.

Hopefully, as this is the 14th day, I have just received the last email. They have sent me approx 20 over 2 weeks.

ArriveCAN wouldn't be required on a Winnipeg to Toronto to Gatwick trip would it? (I'm not doing the return)

You should report them to your email provider as spam/junk

No

Came into Canada from Seattle yesterday arriving about 4PM to find a 1hr 20min wait, only two gates open plus Nexus. First day of no-test of course so might not be typical, I hope not. We seemed to go through the check very quickly - where been, how long, why, where you going etc. ID check and we were through, much faster than many others but of course, we couldn't see why some took so long. A guy in a truck towing an empty trailer pushed across from the Nexus lane and then got detained after a long time at the booth, serve him right.
I'd completed the ArriveCan stuff earlier that morning using my laptop, no problems, just tedious and extremely annoying to have to specify the point of entry and time.