Chronic deliver failure!!!

I am currently on diabetic chronic medication through Discovery and submitted all requested that my medication be delivered to my workplace. I submitted the order and it was confirmed on 25/03/2015 and as this is a chronic medication they are supposed to be delivered within a week. On Thursday 02/04/2015 the driver gave me a call around 16:00 to come deliver and I was already on my way home as it was a long weekend and I was avoiding Easter traffic. he said that he would not be able to come deliver at my house as it is too far, I stay in Rodepoort and work in Melrose. I then asked that he deliver it on Tuesday at my work address again, at 16:00 on Tuesday 07/04/2015 I called Discovery again and spoke to Ronel who was rude and told me that I don't know how the delivery works and that I should wait for two days again for the medication to be delivered even though I had spoken to the person who was supposed to deliver just the other week. Today is now the 10/04/2015 and guess what, no pills and I called in again and spoke to Angela who put me on hold to check with the pharmacy people and promised that my medication will be delivered today. Why are we paying so much money every month