Unfair business practice

service and store policy is unfair to clients - no refunds allowed. with no communication to clients when purchasing face to face. bought an item went to the store for a refund with 3 days of purchase. took my bank confirmation letter with PRETENCE of a refund. then manager got staff to call me after 15 days to let me know the application for refund is declined. so now i have store credit for a store i wish to never step foot in ever again. they are inflexible , inconsiderate and unfair.