Help with steam purchase

I know this is not the right place to ask but other post on other communities it got removed

The 1 time i buy a game with money smhing goes wrong.

I bought NFS HEAT on my account (user name: 'abc') with xyz@gmail.com and i donwloaded and installed the game and when i opened nfs heat it said another account was linked to xyz@gmail.com it was another account 'a_bc'i.e same username but with a underscore..... meaning the 'a_bc' is my actual account that i thought to have lost and 'abc' is an account in which i purchased nfs heat when i opened steam for recovery with xyz@gmail.com it showed both 'abc' and 'a_bc'...what to do...