I have replied to your private message. I will be working with you on private.    
Dear Dell Customer Care, I bought a couple gift cards a few years ago from Dell.  It is my understanding that purchased (prepaid) gift cards do not expire. When I tried to use them now, I received an error message that stated that the card is invalid.   I called dell customer care but no one knows what's going. Please help! Thanks    
My dell gift cards are not valid-please help