What the OP is saying is technically impossible.
First banned accounts are useless, you can use them if the don't get unbranded, which is very rare occasion.
Second, only global mods and admin can ban accounts with a higher rank.
This even all about above is possible, mods have no access to the passwords so again those accounts are useless. (only admins and the recovery group can reset them)
So technically you are complaining about the mods doing their job because maybe you are one of the "victims".
Post your previous user ID and we will solve the case