Worth checking if your plan includes US roaming or a US add-on is active on your account.If it does not, data will stay off in the States no matter which carrier you pick.
Try airplane mode on for a minute, then off, and restart your phone — that fixed it for a few people here.If it still fails, it's the Ontario outage, so just try again in a bit.
Moving support to a dedicated messaging system sounds like a good change. It should be easier to keep track of conversations without having to rely on community DMs. Hopefully, it also means customers get their issues resolved faster.