I was so embarrassed

My debit went off on 01/10/2015 this month, so two days later I go to Game Alberton City Mall to buy a few things, and after ringing everything up im told that I dont have enough credit on my account. Now im left standing there looking at the cashier, a full line of people behind me and fully embarrassed as I know that my debit went off two full days previously.<br> <br> This is unacceptable as my payments are always on time.