Sorry to hear you're still troubled after surgery! Could be for various reasons.
Have you had physiotherapy and home exercises from a good, spinal physio? Could help. Certainly should be tried. Can make muscles stronger, and less spasmy, and free up the joints.
Sometimes the facet joints get painful after surgery, and benefit from joint injections.
Are the electric shocks felt in the buttocks or legs? This could be because the nerve roots in the back are caught up in scar tissue after surgery. Nerve pain medicines could help, But Racz catheter procedures can solve this problem.