@Rexedead
I contacted them to fix it. It was a software considered as a malware and even if the file was completly deleted, I was banned.
I've contacted them and after some discussions, they have reopened my account.
It's a shame the ban can last forever, even if the source of the ban has been duly fixed. A limit of ban duration with an indication would be appreciated and avoid to the staff a useless overload.