I have received a swivel chair, but it is too low to be used at my desk... I don't want to put a cushion on it because it is a massaging and heating one lol..
It would help to see the chair. I dont believe that part controls the height of the chair. Typically it is a gas cylinder with either a leaver under the seat or piece of the seat. There are chairs that you spin to adjust height but considering your chair is massaging and heating, i would assume it is raised and lowered with the gas cylinder. If the gas cylinder is not working it may not be making a good connection. (when you pull the lever it pushes a button on the top of the gas cylinder which causes it to raise/lower) If you put the chair together yourself I would make sure that the gas cylinder is pushed all the way into the under chair bracket. Otherwise contact the manufacturer and they should send you the replacement part.
