Best Buy review: Customer service, store pickup

I purchased an LG OLED C1 65 in TV online on 11/28 at around 3:30 pm with Sanus TV mount and LG soundbar that said it was available for pickup that day. Hours passed by and I tried to call, which took 20 minutes going through the national line, only to have someone tell me the TV "might be getting delivered from another store or warehouse" and "might be delivered tomorrow". How can you have a computerized inventory and not know where your product is? The next day, no updates. Finally called again after 2 days and waited again, asking if there were models of the TV in the store, to which they said yes. We went to the store and it turns out our TV had been sitting ready for pickup, but someone had forgotten to put a tag with my name on it, so it didn't register. We finally picked it up, took it home with the other items including a mount, and after getting home, realized they not only given us the wrong product, but also was for another customer. We went to exchange the item, but they would not exchange it saying they needed to "investigate" the issue and would sell us the correct item, but not at the price we paid because the sale had ended. It is infuriating that such a large company can be so incompetent and there is no recourse, other than never shopping here again and trying to warn as many others as possible.

I would appreciate getting some compensation in the form of a gift card perhaps for the time and gas wasted in driving to and from the store on 4 separate occasions.

Additionally, I would appreciate hearing a root cause analysis as to how an error could could occur in soany different ways with multiple employees.