Hey @RaginKavu,
From what you mentioned here, it definitely sounds like someone else may have gained access to the account.
I do see you've added an authenticator and reset passwords, which is great. I'd also recommend going through these steps to help make sure your computer and account are secure.
We're not able to address this directly on the forums, but I would reach out to an advisor after re-securing the account and they'll be able to look into this further.
You can find more information on how to reach them over at the EA Help website. If you prefer you can also speak with them over Twitter or Facebook instead.