Apple The Summit

Needed a battery replacement for my IPhone 6, set up an appointment specifically for battery replacement on getsupport/apple website. The lady in the store ran a diagnostic on my phone saying I did indeed need a replacement battery but they didn’t have any and it would be 6-8 weeks. I drove from out of town because I had an appointment to replace the battery, I told her that and she acted like she didn’t know what I was talking about and that all my appointment was good for was a diagnosis. My iPhone did that on its own when it repeatedly shut down with 40% left. Extremely unhelpful and disappointing. Did not fulfill their promise or make an attempt to rectify the situation.