I have another account with name vinaybs_m and just upgraded it to Unlimited account. but after using that account for a day and from past 3 to 4 days when i try to login it always says

"Sign-In Error

We're sorry, user vinaybs_m is currently marked as "inactive" in our system. This could be for many reasons, but the most common is for improper behavior or inactivity for more than 6 months. Your account may also be temporarily disabled for security reasons. Please contact nevermore@cheathappens.com to find out why your account has been marked as inactive or if you believe you've arrived at this page by mistake.

NOTE: THIS ERROR CAN ALSO OCCUR DUE TO A CORRUPTED LOGIN COOKIE. IF YOU BELIEVE THIS MESSAGE TO BE IN ERROR, PLEASE CLEAR YOUR BROWSER CACHE AND COOKIES AND RE-LOGIN. YOU MAY ALSO NEED TO LOWER YOUR BROWSER SECURITY SETTINGS TO ALLOW COOKIES."

I tried clearing the browser cache and cookies but did not work.
I have already sent mail to nevermore with receipt number but i have not got any replies.

could someone help me,please.

Greetings