Dr. Corvala
I am sorry that you are having to start over again. Being able to trust your surgeon is important though so I understand your concerns. There are many great surgeons in Tijuana so I hope you are not discouraged. Although I didn't use Dr. Corvala, I did have my surgery in Tijuana with Long Term VSG and my surgeon was Jorge Maytorena. I had a great experience and continue to be more than happy with my results. The price is great on top of the fact that Dr. M has a lot of experience and is great at what he does. Right now, there is a special that I am not sure how long it will last. It is $2999 all inclusive for the patient. It is worth looking into. There are facebook groups that are specifically for his patients or those who may be interested in his services. You'll find nothing but solid reviews for him. You can research him in Tijuana and Mexicali as he has a great reputation in either place.
Good luck on your journey.