Cannot log in to this app

Installed app on ipad, signed up, did the config and all the other stuff. Set up the account. Unable to log in to my account on the iphone, or web. I already deeply regret the hour I wasted on this app and the money I had to spend on a plan because I didn’t want to set up a yearly plan. No support anywhere, obviously.

[edit] cancelled my sub, this app is garbage