9:55 on NYE… OTC?!

This customer came in at 9pm and grabbed a cart and filled it with FSA/OTC items. He then came to checkout at 9:55pm (my store closes at 10pm) and the cashier started scanning his items, the total came out to over $900. He then swiped his card and his OTC card only covered $600 and he said he had no other way of covering the rest so I voided it so we could do smaller transactions. We did another transaction and it covered most but left 3 bucks that didn’t cover. We did a third one and it didn’t go through at all; at this point I had to lock/turn off the doors since it was 10:05pm and after I did that I came behind the register and tried talking to the customer. He called his partner and she was pissed and he also called his insurance company to see if they could do anything about it and they said nope… I told him we could leave the items behind the register overnight and figure something out in the morning. He kept on being persistent that i could do something about it but I honestly had no idea what to do beside to tell him to contact 1-800-WALGREENS and that I could leave a note to my SM. He ended up leaving at 10:25 and we put the cart behind the register, grabbed the drawer to put up and clocked out and heading home.

Was there anything different I could’ve done in this situation? I was honestly at a lost for words and had no idea what to do… I go in for another close shift today and I’m afraid that I’m going to get chewed out by the opening manager and/ my SM.