I always book by text. If I know the shops WeChat I use that otherwise normal text msg. Then when the shop replies I have a written confirmation on my phone.
Not going to help the OP now and like him I would be really pissed off if the same thing happened to me.

My favourite ML does the odd shift at 110. I was out to dinner with her recently and told her I would see her at the shop in a few days time. She said don’t worry about booking but I did anyhow. Didn’t want any mixups.

As it happened I picked her up at her place and drove her to work. Walked in the back door together.