BMW Started Releasing Smoke Out Of The Hood After Being Serviced For Maintenance

The service attendant took my vehicle for a routine recall. A day later, they sent a message saying that your vehicle was smoking from the hood on the road, it was stuck on the road and we took it to the service with a tow truck. I don't know what was done to my vehicle on the road, but 3 weeks passed. They made me go through a lot of trouble, and finally they detected the situation. They say they will change the engine. What a beautiful world, when the engine is changed, my vehicle will become defective. Let them prove to me that this is not the case if I am really the one who broke the vehicle? You had the vehicle for weeks, I did not use it. It is unclear what kind of procedures were applied. It did not give an ordinary, simple error, what do you mean smoke coming out of the hood?