How do u Send ?btc minimum

I don’t know anything about this crypto stuff, itso g but I know that I have a crypto.com app and a defi crypto.com Wallet.
Trying to pay at a vendor,deposit At casino via crypto but there’s a minimum amount that I have to use when I want to send to external wallets it says.. and I don’t have that much..
Any possible way for me to get this smaller amount To be able to deposit at the online casino?