My Google Adsense Account has Been Hijacked ! Your Advice Needed Here.

Hi Warriors,

I have have been using my Ad Sense account for years but I recently noted something was amiss. I have decided to ask in public forum since I have posted severally on Google Forums but no one has even bothered to assist me with ideas.

How it Started
The last time I logged last week, I was prompted to upgrade to the new Google Adsense interface. Since I upgraded I have not been able to log in to my Ad sense account yet I successfully log into my Gmail.

When I looked at ad sense details through Gmail Data Tools, I realized the Payee name had been changed and the address too.

When I try to change in the settings I am not able to log to Ad Sense. I decided to take it the next step further, I decided to reapply so that I would bring to attention the problem to the ad sense team.

When I reapplied immediately got this email:

Thank you for your interest in Google AdSense. While reviewing your application, we noticed that your account information matches a currently approved AdSense account associated with XXXXX@gmail.com. Because our policies do not permit multiple accounts, we're unable to accept your new application at this time.
If you'd like to add XXXX@gmail.com as a login to your approved account, you can do so by following these steps:

• Sign in to the AdSense account associated with XXXXX@gmail.com at www.google.com/adsense.
• On the 'Home' tab, click the 'Account settings' link in the left navigation bar.
• On the 'Account settings' page, scroll down to the 'Access and authorization' section at the bottom of the page.
• Under 'Users with sign-in access', enter XXXX@gmail.com and click 'Invite'.

Once you've invited XXXXX@gmail.com as a login to your account, please check that address for an email invite and follow the instructions to add this new login.
If you can’t access your approved account with jackpanaitojp@gmail.com, please follow the steps in our login troubleshooter. If you aren’t able to regain access to your account using this process, you’ll find an option to contact us. We’ll then work with you to access your account with your desired login.

I am 100% sure I don't have any other ad sense account with this email, I even don't have access to the email they wrote there.

Am wondering, does it mean my account was hacked and if so, what step should I take. I am completely confused like a deer in headlights.

I have decided to ask for help here since all my attempts are futile and I am tied of running all over the internet looking for solutions like a headless chicken. :confused:

Any assistance will be appreciated.

Thanks