[Rant] Canadian Tire in Windermere

Hi all, this is my first post on Reddit and it's unfortunate that it's a bad rant! I was wondering if given my situation if there is anything that could be done if I were to complain to the higher ups.

I made the worst decision ever to make an online winter tire purchase at Canadian Tire. I purchased winter tires and rims online last week, to be picked up at the Windermere location. Called them to say I will pick them up, as I have someone who will do it for me.

I get there today to pick them up and they still charge me the mounting fee because they already mounted the tires on the wheels! Can they even do this without my consent?? The guy at the counter was unapologetic at all. I told him that I already had someone who would do it for me and he kept going on about "if you go somewhere else, you won't get the warranty" (is this even correct or just another money grab??).

All in all, I still paid for it, because I didn't want to bother wasting time getting them to take it apart again (that's the only thing he offered).. Is this even worth complaining about to the higher ups? As a first time winter tire shopper for my first car, I'm so ticked off with Canadian Tire and I never plan on giving them my business in the future.

Any advice would be appreciated!