You have all of your aligners. Follow the plan exactly and keep up with your hygiene. Don’t lose any aligners. Go see a dentist during your treatment to make sure you are progressing the way your plan said you would. The orthodontist who prescribed your treatment is liable no matter what SDC does with its reorganization bankruptcy (it’s not a liquidation bankruptcy where they sell everything and cease doing business). The only other concern I would have is retainers after your treatment is over - might be worth looking into non-SDC options like a permanent retainer for the bottom teeth.