Mistreated at The Glen Mall

I purchased a glass cleaner which was priced around R24.99.When i got to the tills it scanned R0.00.I then decided to go take more products the teller left serving the next customer and ran to the shelves.When i got there she pushed me and blocked my way .I then said to her i need to take a few more she said no its only for the stuff.I felt so disrespected and belittled as a customer.Im hurt