Incorrect medication issued and refund option denied by Clicks Pharmacy

Collected a box of prescribed medication. The pharmacist at zevenwacht branch did not look into why the items weren't covered by my medical aid. They issued the wrong items to me and only gave me the option to pay for it myself. As a type 1 diabetic having the items is urgent. I did the necessary follow up by contacting discovery health and their response came back a week later. It was confirmed that clicks pharmacy was the reason for the mishap as they made the assumption of which items under the prescribed brands could go into my collection box and did not follow up on why my medical aid was not giving me coverage for the first time after being covered for 6 years. they decided to go according to the history of my issued medication and stated that that is why they did not look into it further. They are also refusing to take back the medication that is sealed and unused and are demanding that I use it because they are not going to issued the refund. The expectation is that I must pay an additional R933 on top of the fee I already pay for medical aid month to month. If the expectation is for me to check myself, the option should have been explained. If they are simply telling me that I either pay cash or don't take it, it would obviously cause an alert and alarm of concern for any diabetic patient. I would not leave the store without it.