What can I do if I paid my attorney to file bankruptcy and they have done nothing and will not return calls?

Hello all. I paid for a bankruptcy almost three years ago now. The price of the bankruptcy seemed rather high compared to other attorney's prices in the area, but I had used this firm before and liked the previous experience plus mandatory estate planning was included in the price so I went along. The total package was somewhere in the neighborhood of $3400 for joint filing and estate planning, which I couldn't afford to pay all up front so I opted for payments. The attorney instructed me that they would be unable to file until I was paid in full, so every month I paid $900. The final payment was declined and as I was busy taking care of my wife who is newly diagnosed with MS, and the fact that I never heard from the attorney, it was easy to miss the fact this occurred. I was never notified of this fact by bookkeeping, and once the estate attorney finally called us to setup the preparation of our wills almost 2 years later, I was informed that I owed $900 upon inquiring about the status of my bankruptcy. I had accepted a job in another state and stated that we would be moving soon and agreed to pay the final amount so that the bankruptcy could finally be completed. My attorney called me once a week after I moved and stated that we had six months to get everything completed as I had to file in the state I lived in the last six months and she would mail any documents needed to me for completion. This never happened and of course no one called me. Going through all of the stress and being busy moving my family 800 miles and acclimating to a new work environment, I had forgotten my conversation except for occasionally when I would remember after hours of course. I had put off filing official residency in this state for other reasons, and recently had to do so. Recalling the previous events, I now have my calendar reminding me to call the attorney every day at 10:00 a.m., and have been doing so. I have called every day for the past two weeks and have yet to speak to my attorney.