Does not work

Ever since the last update was done it does not work. When I try to open it it kicks me off and also in my contact list it no longer has names but just the phone numbers please please please fix it so I dont have to lose everything. I cant even get on long enough to get phone numbers down so I dont lose anything.

Rebbyreb99 about Talkatone: WiFi Text & Calls, v5.5.3