Hi, Welcome to Health care magic forum.
As you describe, there is a complete cut of the blood supply to the finger distal to the bandage.
you can have a recovery up to half of the tissues, for rest of the tissues, it will be better to have a
medical help.
I advise you to consult a physician for diagnosis and treatment.
I usually prescribe to my patient with such symptoms
ofloxacin,
diclofenac , serratiapeptidase,and Bcomplex.
Take more of green leafy vegetables, pulses, sprouts, and protein rich foods to have good recovery, and resistance .
wishing for a quick and complete recovery. Thank you.