I have a 12 yr old malamute that got ear mites about 4 years ago, from scratching she got an infection in both ears which damaged the cartlidge in her ears now she seems to constantly scratch at her ears and yelps in pain, we've taken her to the vet numorous times and nothing they do seems to help her.
I recommend that you get a second opinion from another vet. Ear mites are usually cured with medication such as Tresaderm. I recommend treatment for 3 weeks. If the cartilage is damaged your pet may need surgery. Good luck, vectare