Barber Chair Help

i have a old Theo n Kochs barber chair tht was working perfectly fine all functions. Today i lowered it n added hydraulic fluid to get more lift, i felt i added to much but it wasnt over flowing. i then pumped it n raised to c how high it goes now n i pumped it too high n lots of fluid came over flowing out but even worse now my chair will not come back down. It is stuck at the highest point n when i try to release the pump lever it drop chair it drops a inch. i tried jumping on it pushing it down as i held lever but still nothing. i have pics , it seems to almost b out of the base but it wont move...smh i really need to fix this, my shop inspection to open my 1st shop is next wk, having panic attack lol appreciate some help n ur time thanks i dont kno how to add my picture to this post to show wht it looks like incase i didnt explain it too great