Cash App complaint: Scamming false advertisement

I ordered something from doordash using my cashapp card because I had saw a discount on there that said 15% off one chick fil a order and that the maximum that they could take off was 7.50 and that the minimum the person could spend was a dollar and something however I do have the screenshots. So I checkout and pay and it took the exact amount it said my order was mind u I had applied the discount and it had notified me that it had been activated and ready to use. I text them about it and they take forever to respond everytime I have an issue with something they’re very rude and seem to can never help. Also just not long ago I had been scammed by youtubers using the same cashapp card for $50 and they said they couldn’t do anything because I had sent money to them which I also have all the screenshots and everything on how the entire situation went down between the person and me and cashapp and me. The thing is they act like they are such a good bank and influence everyone to go with them and fall into this trap. Something happens with your money and you can’t get it back.. unlike a real REGULAR bank that they say they so called are.