First off, when you had your clutch done, did the dude put in a new cable? If he did he likely used a cheapo parts store cable which is NOT a suitable replacement. There is also the TOB preload that you need to set and THIS is the point of a firewall adjuster, not to move the pedal engagement point up and down. Too much tension on the cable and you are putting your TOB though hell and potentially never letting your clutch fully engage. Too little tension and the TOB won't ride on the clutch fingers. This might sound like a good thing at first but the TOB is designed to ALWAYS be spinning. This is so whenever you push in the clutch the TOB isn't going from 0-6k (or whatever RPM you are shifting at) in a split second.
To set the correct TOB preload with an aluminum quadrant/firewall adjuster and stock cable you set the firewall adjuster to a loose setting and pull the dust shield off. Then, with the car up on ramps and the e-brake on and the wheels chocked AND a buddy in the car with foot on brake you crawl under the car with it running and shine a flashlight into the bell to see the TOB. Have a second buddy (or crawl out and DIY) start clicking the firewall adjuster tighter until the TOB just starts to spin. Then go one click tighter and that is your proper preload. If you want your pedal moved up or down besides this you need a clutch quadrant with 2 or 3 different hooks.