What can I do if I have a non functioning gallbladder?

Liver sludge. The problem that caused gall stones is still there. Liver produces the bile which needs b6 as pyridoxal 5 phosphate and phosphatidyl choline. Once the bile flow normalizes pain will stop.
Symptoms? No symptoms, should be safe to do nothing. If you have symptoms such as pain in the right upper abdomen, jaundice, or fatty food intolerance, then consultation with a general surgeon would be in order. The treatment is to remove the gallbladder (if you have symptoms).