Did you try to change the footswitch ? It is my last resort when a circuit doesn't work and i don't know why...It worked once or twice.
I wouldn't get my hopes up because the soldering side of your pcb looks like there has been some struggling, but if you have an other 3pdt around, it might worth a try, just in case.
led resistor should be something between 3.3k and 4.7k, If i am not mistaking.
Getting a new pcb without parts means you are willing to desolder everything. It's easily managable with patience and desoldering practice, but I would at least get new transistors as well, because they are heat-sensitive. All your other components are more resistant.
You should use sockets for your transistors next time, these will allow you to easily take them off the pcb, to protect them from heat, while you work on the pcb, or change their orientation if need be, without using an iron.
It looks like that :
https://www.musikding.de/20-Pin-inline-socketYou just push the transistor's legs inside the tiny holes. It can also be useful for diodes or whatever component, if you want to try different things.
I would suggest to start again with a whole new kit, and keep this one for the day you will be more experienced. When you'll have 10 or 20 kits done, you might be able to get this one working and add mods. But this is just an opinion.
Debugging a circuit is easier when you are familiar with multimeter's functions, electronics basics, and when you already have debugged some circuits. The first time debugging is always quite difficult. I'm sure you have already learned a few things about polarity and soldering.
I am sorry we couldn't help you more and get this fuzz working.
Edit : if you couldn't even turn on the led, it could mean that your DC power jack wiring is wrong, or the footswitch wiring is wrong, or the footswitch is defective...or the led wiring is wrong.