Dentist fraud, I only needed one crown but he puts four crown

I visited a dentist for a tooth cavity problem. The dentist told me that I had four cavities, two on the right side and two on the left side of my mouth, and that I needed to undergo one root canal and four crown treatments. However, after the treatment, I consulted another dentist who told me that I had only one tooth cavity on the right side and that the previous dentist had done unnecessary crowning on three other teeth on the left side. Moreover, the previous dentist had not done the root ca