Why MacDonalds won't see me again

I ordered a Cafe Latte take away from the Sunny side branch. It took some time and inquiries before I eventually got it. In the car, I take a sip of some tepid liquid. I walk back in and the staff offers to reheat it for me. I left at that point. I left a notice on their website and got contacted a few days later. An apology and promise to educate staff. Not even an offer to refund me the money.