Have your players opened a troubleticket with EvenBalance and lodged an appeal @ PBBans ?
We have opened up the appeal system to include #50000 violations and above, but they must include a TroubleTicket link.
Usual rules apply;
Tell them as much about why the ban was generated that you can, and make sure you ask the question directly;
"Is this PB software violation valid or not valid ?"
I can only reitterate what I have said already, we have to work within the constraints of a system that the game dev's & PB impose upon us, and I will admit, that at times it's like wading in mud.
Hopefully the support staff at EB will make clearing up bans generated within a specific timeframe a priority, but please bear in mind that the huge influx of tickets might cause a delay in the normal response time.
RodeoBob has already stated;