Poor and rude service from Dischem Sunwardpark

Our Dis-Chem Sunwardpark Boksburg pharmacy has the most rudest pharmacists working there. I got pain meds in January and opened it on Monday for the 1st time. Instead of 60 capsules there was only 20 capsules. When I phoned to quiry about it they said what tells them that I haven't already used the other 40. They didn't even on the system to see if they still owe the medication. There telephone system is beyond useless because they seldom answer the service.