Is it useful for Tesla to complain about sales staff?

Useful. Tesla vehicles are salesmen who sell cars in the buyer's market. If there is cheating or misleading behavior, you should complain, and you should complain to the superior of his company. If you receive illegal expectation misleading, you can claim compensation, and the evidence can explain everything, so it is useful. It can safeguard your legitimate rights and interests to invest and pay in the company or even the relevant units like this administration for industry and commerce and the Bureau of Taxation and Technical Supervision.