They sold us a medicine and we were missing 6 dose...

They sold us a medicine and we were missing 6 doses in the bottle. We were very careful to give the right dose each day, impossible that such a big difference in quantity could be given by mistake. The girl at the reception told us that there may be losses. .? We only had 3 days out of 14 left for this drug and because of the mistake they made we have to buy back the entire drug !!! No question of saying that they are the ones who are mistaken in their dose. Very very disappointing and no sympathy for the customer in my case.