I have a GCW since a year ago, and i have accidentally dropped it twice in a year, and guess what: Nothing is broken.
Ok then, i will assume you've had the bad luck of having it impact in the wrong angle, with the wrong side, in the wrong part of the console and with the wrong amount of force.
But wait... now that i re-read your original post, i realise that the impact didn't break anything, it just made the slider pop out of its place. It was you trying to use brute force to put the slider in its place what broke both the switch and the slider:
When I tried to reconnect the clip the force broke both the clip as well as the switch.
First of all, even if the force is strong in you, using brute force to fix anything, is always a very bad idea. You have just discovered why it's a bad idea, and you are crying it's the console's fault. You are the one who has created the "idiot user" scenario, not me.
If your slider lost both of its notches,
you can glue the broken notches back to the slider with super glue in a minute. It's the third time i tell you, but you dont want to read.
Of course, if you say it can't be done, then i assume it's because
you didn't even care to recover the broken pieces. Which is your second big mistake, and the second reason why you are crying. This is just an assumption, because you haven't explained if you have the pieces or not.
Anyway, assuming that you lost the broken pieces, you have 2 options:
A) Create the lost pieces from another plastic object, and glue them with super glue.
B) Email justin and ask him to sell you a replacement part, but i advise you that nothing is guaranteed (not even an email response) and the shipment could take anything from 3 days to a year.