Well there was me looking for new agencies to sign up with and I came across this thread, glad I didn't bother with them
I checked Canva out they're Australian that just explained the attitude problems Canva have. 
Like Indiana Jones would or might have said "Australians, I hate these guys" 
In most business where there are suppliers and buyers, it's extremely rare that suppliers will be treated in as high regard as the buyers. I'm not saying Canva are the same as I'm not with them, I also haven't been through this thread. However, I am certain their attitude towards buyers is as faultless as they can be (like most businesses). And whatever their attitude is towards contributors I very much doubt it has anything to do with their nationality.