We have over $100.00 in gift cards and the cash registers will never read them. We have held them and don't know what to do about this costly situation. What is the answer/

Just go to the Customer Services Desk at the front of the store and show and ask them about it I am sure they will know and help you use them and all that .

Maybe the cards have not been actived right by the stores

Have you tried to just make an online purchase using the cards? You simply put in the code on the back of the card