Solder-It - ScrewGrab Friction Gel - Helps Grip Damaged Screw Heads - 0.5 fl. Oz

Depending in how f’d the head is, this can help. If this does work, get some drill bits https://www.amazon.com/dp/B0017SZ4T6 And use a new screw but put a small dab of anti-seize on it, please.