2000 vw cabrio convertible top

I’ve had this car for about 5 months and today when putting the top down no problem, it would not go back up automatic. When I checked the hydraulic fluid level it was way below minimum and went to get the fluid specific to my car to fill up. We filled it with the fluid and put the top up manually and down automatically, the fluid would disappear and we would refill it again and did this process until the entire quart of fluid was gone. The top still does not work and fluid is not there. Where did it go? There are no leaks at all. I am so stumped on what to do. Please some suggestions?