Hey dhruweeeeee,
Please reinstall the game once more. Once you're back in the game, from the settings menu, select the option to link to your EA account, following this guide. If that's where your main account progress was saved, you should be able to load it up again.
Let us know if you run into an error when signing in with your EA Account from the settings menu, and what exactly happens.
A photo of the error message you get, or of the settings menu in the game if you don't see the option to log in with an EA account, might help figure out what else could be causing this.
Let us know how it goes when you can.