Question why did my profile name randomly change?

It was originally Matt87 and it randomly changed to Mdkozon with out me doing anything?

Now when I try to get my old screen name back does not allow me.

Yet on crydev I am still Matt87 any help would be appreciated thanks.

Have the same issue, It was months ago i played last time, Now when i try to login on the game, it say internet connection issue.

My name was raldo94 now its recon6 , And the Country is the one on the top of the list, "afghanistan"
And im getting this error: Invalid nickname given, please try another one (GS)

Had to rend a resset to my email, Now i have a diffrent name, When i tried to loging width my original name it gives this error: "Sorry, a validation error detected. Please, try again. If you continue to have problems contact the administrator"