It has nothing to do with BMW Canada. It has even less to do with BMW North America in the US, or BMW in Germany. Your issue is with a privately owned dealership that you authorized to do a repair for you.

What does your work order say about dropping the engine? And why does whether they dropped the engine even matter? You would have signed it in, and signed it out, I believe. Read those documents. Did they charge you for dropping the engine? Did they charge you for changing the timing chain tensioner? Is it on the parts invoice?

You seem to be trying to trap them based on your interpretation of what you thought they were going to do, and what they did.

I would think that a resolution will be very difficult to reach given the attitude you are expressing in your post. If you want to give it to the lawyers, fine, but remember that lawyers don't fix cars. They just make money off disputes. If you want to go that way, go to another repair shop, and have it fixed to your satisfaction. Then go after the original dealership for your out of pocket expenses for the first repair. It may cost much more than you have already spent, but at least the lawyers will be happy.

Your best bet is to work with the dealership, calmly. Just a suggestion, but calling people scam artists isn't going to endear yourself to them. And I find it noteworthy that that dealership has pretty good customer satisfaction scores posted, including the SA that you are slandering. If you were smart you would remove the names of the dealership staff from your original post before their lawyer calls you. Otherwise you will end up shutting off communications with the one group that can resolve this, dealership management.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue