" I even unscrewed the faucet and cleaned it and it still not dispensing water like it should. "
I am not sure what this means. Did you clean or even remove the aerator? Did you replace the cartdidges?
Is the cut-off valve open (yes, just like the old, is the computer plugged in? question) Did you replace the cut-off valve like HR suggested?
HR's post is right on. If the water from (or before) the cut-off is OK, then it is the faucet. But, the parts are usually the problem, not the faucet itself. "The whole is the sum of its parts!"