Family Dollar complaint: 5$ coupon good only 1024-1025

I went out on smart coupons and clicked for the ones that I wanted which was the 5$ off 25$ or more and some others. I had never used your coupons here before, so I tapped the button on my computer and it said I could print them which I did. after I printed the four coupons I saw an expiration date on 3 of them which stated 1024 which was today but they had expired on them. so I just took the 5$off one and off to your store I went. I had a total of $48. and change, I gave the cashier the coupon and told her there wasn’t a scan bar on it, she got the manager and the manager said put in your phone but it couldn’t identify me so I put my other in and again it couldn’t identify me. The
manager said sorry since there was no scan bar she couldn’t do anything. I said to her you can’t override the 5$, she said no.
I said thank you sorry that they had to put the stuff back but I didn’t want any of it. I said you gave up a $48.00 sale. I had 2 pair of 84 curtains, paper plates, Pan teen volume shampoo, pk of 6 dish cloths and pk of 2 dish towels and a Heath candy bar. in today’s world where business are struggling you get a Manager like this. I have been a Supervisor for 33 years which is like a Manager and I worked to accommodate people as much as I could but she wasn’t interested in doing anything. I’ll never go back there again but I cant say if I’ll give up on all your stores. This took place on October 24th around 6;30pm. Thanks