Discord Nitro

its says "unable the confim the payment method: the token (token) has been already used."
Pls help how can i fix this

Generally that means the offer has already been used. You'll need to contact Discord support about it.

When I click to claim Nitro, literally nothing happens and I'm pretty confused.

Can i just cancel before it starts charging me?

Yeah, go in subscriptions and press cancel on the nitro pop up, you'll keep the nitro you got for free but you want pay the nest months

I just beat Dr. Wimpus and I got the Discord Free Nitro Button but when I clicked it, it said something I don't understand. Somebody please help me and explain what's happening.(Check the bottom of the picture)

The promotion ended yesterday afternoon and the Discord bots aren't supposed to show anymore.

That one showing still in Android was reported but the back-end feature for the codes was turned off so it won't work even though the bot is still there.