I have a friend who's son was affected by this, too. No digestion problems, but it's still upsetting to have trusted a company with something as important as your baby's food supply, only to find out they weren't be careful.
Have you looked into donated breastmilk? I'm wondering if, with the preemie status AND the digestion issues, you'd qualify to get some? Or maybe you could find a local mom who would be willing to donate (through friends or finding your tribe forums?)
We had big problems with formula for dd's adjustment here...she was used to Korean formula, and we spent two months on the rollercoaster of digestion, colic?, reflux?, etc....NO FUN.
She was so fussy and upset and impossible to comfort...I've never been so stressed out and sleep-deprived in my life! Anyway, all of that was to say that we were pretty close to asking for donated breastmilk ourselves. Instead we found a friend (through MDC!
) who could ship us her old formula from Korea, and that ended up helping. It was a long road, though, and I want to send you lots of hugs and support. I hope you turn a corner soon.