You are not good enough yet to move up. I have hit with a lot of junkballers. It takes a long time to learn how to attack them, but once you get it going, you will beat them.
The secret is to keep the moving side to side. trying to push a guy back who is chop blocking your shots feeds into his game. you need to have great directional control with your shots.
Please help TT Member BruceD get a wheelchair so he can play tennis again - http://tt.tennis-warehouse.com/showthread.php?t=496820