E53 X5 Tow Hitch Assembly Purchase Drama! Have a few questions.

[Johnny_5]

Long story short...I purchase which I thought was a complete assembly and provided them pictures of everything and emphasized multiple times I need everything from bolts and nuts to wiring, etc which they stated is no problem. Drove to the shop and they couldn't find anything other than the bumper re-enforcement. Waste of a trip out there. Promised me they would get me everything and ship it free of charge. Almost 2 months later still haven't received anything nor a call! Finally reached out when I had time and now they are blaming the shipping company for losing it! Asked for the tracking information which they couldn't provide! I call BS! A few days later they said they have everything and will ship it. Said screw that Ill come out and pick it up! But emphasized does it have everything? He's now stating he only has the bumper re-enforcement and tow bar assembly. WTF!!

So now for my questions!?!

First question should I back out of the purchase or should I just say screw it and pick up what they have? From what I hear finding these parts are getting extremely hard to come by now a days. Which leads to my next question.

Second question is it going to be near impossible to find the rest of the pieces to get this mounted to the X? Bolts can be purchased at any hardware store right? Would prefer factory but if I cant get those will hardware store grade work just fine?

Third question how much more am I looking to spend just for the other parts? The good part is that I have the main two pieces and the other parts could be purchased online and shipped.

Thanks for taking the time to read this and letting me vent!
Any guidance would be greatly appreciated!