App store game username.

I downloaded war of colony from the app store and have an existing account with

Loads of time and money invested.? I started in the app store support and was handed off to iTunes back apple support to developers support and I am getting no resolution. I just need to know how to recover the username password. I am not even sure I had to enter one whe I firs t got- I hAve to use my apple id

To make any purchases and even my apple id doesn't work.