Kudos to you for going back and apologizing for being rude - I can understand how being sick and having worked all day it'd be hard to remain composed when you're being jerked around and all you want is your meds.

It is strange that the pharmacy was unable to contact your insurance company when you were easily able to get them on the phone. In your shoes, I might have called the insurance company on my cell phone while still in the pharmacy, just to be sure and save time.

Also, they way that you wrote it I was a bit confused about the debit card situation, but it sounded like they kept / left your debit card in the drive-thru drawer, which is incredibly irresponsible on their part (and yours, to be honest).