Dental Implants; Where can I go to get the best information on how and what I need to have done?

I have had a nightmare situation concerning implant dentures. I am on my 5th dentist and now an attorney for malpractice. The dentist I am seeing now has informed me that my previous work is not satisfactory and needs to be redone. I have already paid $25,000.00 for the dental work I have had done and cannot afford to have the work redone. It was a hardship for me to pay out the first $25K. Now I need an advocate to help me find an affordable way to stabilize my mouth. Where can I go to get the best information on how and what I need to have done? My denture over implants keeps breaking the screws holding it in my mouth. I don't think new implants are necessary. I think a new prosthetic should work. I don't think it should cost $20,000.00 my latest dentist has quoted me.