Dear Customer (name blocked for privacy),
You will only be loosing the seniority for hte 8 months you were not working.
You have the right to sue, however, it will be a weak case because of, in this case your union association. Since you are a member of a union and filed an arbetration, you were essentially agreeeing to accep the outcome. You can always appeal an outcome.
Still courts have ruled in favor of the plaintiff,even in the face of binding arbitration. Especially if grevious harm has been caused. I think not getting back pay is horrible. My recommendation is to find an attorney who practices employement law and sit down face to face for a heart to heart talk and see if he agrees.
YOUR PAYMENT AND BONUS IF ANY MAY BE TAX DEDUCTIBLE

Edward M. Johnson