Many thanks ... My account is active again. Some trouble to get access to my database (hosts with new names ?) but I guess I have some news ans announcements in late to read ...
I resubmitted my request several times (as several threads mentionned it) , at different hours or different days without any chance to have it unsuspended.
When trying to unsuspend my account I still get the message
"A system error occurred while processing this action.
Error Code: E7942548"
Unfortunately the following forum thread http://x10hosting.com/forums/showthread.php?t=115515 didn't give me any issue.