Polish convenience store chain Żabka experienced a technical issue on Sunday affecting discount calculations during transactions. The error impacted a portion of purchases, causing incorrect rabat application. Żabka quickly responded, working to rectify the problem within its promotional system. The company reports that the issue has largely been resolved across most stores. Correct billing is being restored as the network implements fixes. Customers experiencing discrepancies are encouraged to contact Żabka customer service for assistance. The company has not specified the extent of the financial impact or the number of transactions affected.