Post nerve decompression surg for occipital neuralgia & migraine-now spasms that are electrical, tazer like - very painful-need advice on what to do.

See surgeon. I would recommend that you go back and see your surgeon. If they can't help you then i would recommend that you see an interventional pain management physician.
Follow up. I would first recommend follow up with your treating surgeon. Treating conditions of chronic pain can often be complicated by associated symptoms of pain. Your surgeon can best describe what you should be expecting to experience at this point in your recovery.