Bad customer service

I made a purchase at pick n pay linton corner and the mistake that happened was that I was not told to enter my Pin but the value of the items purchased. The amount was seven hundred and something but I entered one thousand and something. Emails were sent to pay just now and pick n pay instead of them resolving it themselves but till today the matter is not resolved. I am the one who is always driving to pick n pay, make calls but they don't do their part and treat this as joke I guess. My second debit went through and my last debit will be on the 25th of January, second debit wouldn't have went through if this was treated with a matter of urgency. I have been polite and now I am tired.