Yes, you do. The stock is worthless. All those stores have been closed, and the intellectual property sold for peanuts.
Bankruptcy is pretty simple to understand. Common shareholders are DEAD LAST in line for assets. In front of them are Government (usually taxation authorities - Federal, State and Local), then debtors, then creditors, then preferred stockholders. Common shareholders only get what is left after all the classes in front of them receive 100% of what they are owed. That is the LAW.
In this case, Bon Ton's assets are not worth anywhere close to what those classes are owed. There is really no chance that common shareholders will receive anything. Nothing.
Upon the finalization of the bankruptcy, the common stock will be cancelled without payment of any kind. Anyone left holding BONTQ shares will lose 100% of their investment.