It is absurd to assume the original poster of the complaint is the one at fault with no proof or evidence to support that assumption. Furthermore, here are PBS's terms of service, admitting that they will steal the credits and money of anyone they don't like. They will also steal your money and credits if they decide for any reason to close their site, or if you don't use their site for a year.
National Book Swap reserves the right to immediately terminate the service and forfeit all Book Credits of any member who National Book Swap determines, in its sole discretion, has violated one or more conditions of this contract. In the event such termination occurs, National Book Swap has no obligation whatsoever to refund any portion of fees paid or to pay compensation for Book Credits forfeited or lost use of Site privileges.
National Book Swap reserves the right to terminate service at any time without notice. In the event of service termination, Site members will not be entitled to any compensation for outstanding Book Credits, whether earned through book shipments or purchased.
and let's not forget:
An account may be deemed "dormant" when no items have been ordered, shipped, or purchased within any 1 year period. Dormant accounts may be closed and any accumulated PBS Money forfeited without compensation to the account holder.