I was turning on the cold water faucet on the laundry tub to rinse something off and the handle went too far and now the water will not turn off, even after I removed the handle and used a wrench to try and turn the screw in; but to no avail. I have to turn the water off at the water meter because I have no idea where the shutoff valve is for the sink itself, but I don't think there is one. What will I need to fix this and how much will it cost me?