I cannot add a phone number to my account

I tried contacting support but it wants me to post an id before contacting support. I do not feel comfortable with this because I do not trust Blizzard employees.
It keeps telling me my phone number is invalid. I am in Canada and it is my only phone number.
I tried to check if my country was set correctly and it wouldn’t let me do that either. What kind of scam is Blizzard running where they need my personal info? How else can I contact support?
Now it’s telling me an external error has occurred.

I managed to finally get to contact support and 5 hours later they just keep shoveling the same copy paste message that has nothing to do with my problem.