Hello, I'm sorry to hear you're having issues and for the inconvenience this has caused you. Please send us a customer support ticket via in-game, or through https://cloudcade.helpshift.com/a/shop-heroes/
and we will do our best to resolve the issue. Please have your city members contact us as well so that we can try to help them.
Please make sure to try and provide as much information in the tickets as possible.
This reply goes applies to anybody who is currently experiencing account/data loss when logging in today.