Pharmacist cant do basic math on prescription

So I went to Clicks Chilli lane in Sunninghill to refill a prescription that was filled in on 14/2/2018. The pharmacist assistant refused to refill it and said it was expried but the 6 months expires on the 14th of August. How does that make sense clicks?!?! Both your pharmacist assistants cant do basic math? Their excuse was that is what we were taught at pharmacy school. Sad when an adult cannot even count!!! No wonder you have no customers in your store!