Hi, I don't have enough information to tell what happened. It's common to perforate the bladder with the instruments used for your sling surgery. If the puncture is discovered the instrument is removed and replaced in a better position outside your bladder and the bladder heals in a week. The bladder puncture shound have not caused the sling to be removed unless the puncture was not recognized at the time of the surgery. The dissection of the tissues around the urethra to put the sling in can weaken the urethral sphincter mechanism or support, causing worse incontinence with the sling out. I have no idea what would be causing the leg weakness and spasms. Your next step is to talk with your Urologist about the options to fix the incontinence and a consult with a neurologist to evaluate the leg weakness and rule out a nerve injury. Good Luck.