Not Reimbursed

So tonight I shopped for 24 items at DG. Get to Checkout and red card declined……..three times. People behind me shuffling and whispering. Cashier getting pissed. Finally she says she has to void sale as customers behind me getting upset. I Called support and explained. They asked me if I wanted to pay and get reimbursed. I refused because two weeks earlier I paid for order and DD refused to reimburse me, even after I disputed. Plus cashier giving me stink eye over possibility of re- ringing. So they said fine and unassigned order. I spent over forty minutes total on this order including DD support call. I was told I would not receive any pay. What???? This wasn’t my fault and I truly tried to get this resolved. Cashier pissed at me! Customers pissed at me. Was on chat tonight for another forty minutes. End result was…., because order was unsssigned there would be no reimbursement. Do I have a right to be pissed off?