Removed sink, now what?
Unfortunately, you have gotten yourself into a situation that is most likely going to require opening the wall to replumb the water supplies and possibly the drain. If you have access to the back through another wall, then you will not have to remove some tiles. If you don't have access, then you have to open it up from the front, not an easy job. The support bolts are probably secured to a horizontal stud and bolted on both sides of the stud to prevent them from turning. 

Is it possible to see a pic of what you took out and what you want to install?