Not a Solana signature
You copied the wrong text. Go back to Solscan and copy Signature.
Not found yet
The network is still catching up. Wait a minute. Tap I sent it again with the same code.
That transfer is short
The amount was smaller than the green number. Send the missing SOL to the same address, then paste the new signature.
Quote expired
Lock a new amount. Send that new green number. Do not reuse an old one.
Card declined
Try a Visa card, Apple Pay, or Google Pay. That decision is Phantom's payment partner, not the desk.
Can't buy crypto
Some places block it. Buy a Binance gift card on G2A and pay with that instead.
Still lost
DM @ZtrPot on Telegram. Send the signature. Never send the 12 secret words.