Imp**** Customers is liers

We shop for some sweets at Pick 'n Pay today (16/03/2015), after we bought the sweets we check the price difference on the slip as we about to leave, so I went back ask for a supervisor to follow me for a price check and demanded for Pick 'n Pay double the difference, as we got at the shelve she imp**** that I'm a **** that we bought the 150g Cadbury chocolate and not the 87g chocolate, so I rechecked the slip, because I'm sure we took the 87g, as I check the slip, I'm sure we bought the 87g chocolate, who are Pick 'n Pay employees to imply that their customers are lying where they are not so I make the scene and ask who give her the right to call a Pick 'n Pay customer a ****, she even called the local security company for that, so I explained the security person what the situation is, he agreed and left, who are Pick 'n Pay to even try to arrest a customer, after Pick 'n Pay imply that customer ****, where he did not, the supervisor even refused to give her name when I warned about hellopeter, than I saw the manager DJ, explained the situation, and received double the difference, my point is how can an employee imply a customer is a ****, while Pick 'n Pay try to ***** f. custome