Burger King locations in Oakland County, MI (Southfield, Waterford, Berkley, Pontiac, ...)

Was asked to pull forward at the drivethrough, then had to wait for more than 10 minutes. After 12 minutes of no information, I decided to enter the store and ask for a refund (at this point I was late for work). The manager, Nick, first refused me a refund, and after I pushed, he went to a computer and refunded the wrong person. This seemed to make him mad because he began swearing at me, verbally abusing me. He asked me if I was going to bring the drink back (a medium sprite that they had handed me when I paid). I had already drank the sprite while I sat in the car, so I said this and said I can bring the cup in if he gives me a refund. He refused, again with foul language and abusive remarks. I asked if he was serious, refusing to refund me over the cost of a soda. I had not received my food, I was not informed that it would take more than 10 minutes of sitting and waiting, and so I again asked for a refund. Finally, he went to the cash register and pulled out a partial refund, saying he wouldn't refund the money of the drink.

Honestly, the end result is fine, I understand that I consumed the beverage and so therefore am not entitled to a refund, however the amount of vile language, verbal abuse, and disrespect that Nick showed for me is unacceptable.