Is a lingual nerve damage from wisdom tooth extraction something worth pursuing?

I went to a dentist for a routine cleaning when we discussed the possibility of getting my wisdom teeth out. Two erupted and two partially erupted. The dentist have me three prescriptions before the surgery, antibiotics, Vicodin and some medicine that was supposed to sedate me an hour before surgery. I took all medications as prescribed. I took my medicine that was supposed to sedate me. It did absolutely nothing. I didn't even feel woozy. They were stunned to see me in my state but felt that they could sedate me otherwise. They gave me crushed medicine that they referred to as candy and after about 4 or 5 doses and gas, I was sedated. This was supposed to take 3-4 hours but instead took 7 hours. I woke up several times through the surgery and heard them talking about not wanting to dig deeper. The last time I woke, I asked them for a break because I needed to go to the bathroom. I hobbled to the bathroom and began to cry from the pain and realization that I was even awake at this point. They have me more candy and when I woke, they said they were done. The next day I had pins and needles in the left side of my mouth and gums were numb. I still have no feeling. After a quick check up, they chalked it up to a lingual nerve injury that may or may not heal. After not hearing back from them, I emailed the headquarters, which they promptly wanted to pay for a checkup and pay for me to see an oral surgeon. After further X-rays, they not only gave me permanent lingual nerve damage, but they didn't even remove the root at all. The oral surgeon was astonished at my X-rays, length of surgery time, and damage.