I went to an SBTC website and was instructed to enter BTC address and word phrases.
This mistake (falling for a scam) seems like it might stem from a misunderstanding about how Bitcoin works
What do wallets contain?
A leather wallet in your back pocket contains money (e.g. in the form of dollar bills)
A bitcoin wallet does not contain money.
The only important thing stored in a Bitcoin wallet is a private-key. This private-key is a large number that allows the holder to control movements of money in the public blockchain. The private key is calculated from the word-phrase. If you give that word phrase to someone, you are giving them your private key. If they have your private key they have control over all your money.
How do "airdrops" of forked altcoins work?
When someone forks an altcoin from Bitcoin, they sometimes give the owners of Bitcoin a proportionate amount of the new coin. This is essentially done by putting an amount of the new coin under the control of the same private key -- but they don't need to know the private key to do this. They often just base their altcoin's blockchain on the Bitcoin blockchain up to a certain date. This means that Bitcoin keys automatically become valid altcoin keys without any process involving knowledge of the private keys. If you think about it, people can give you Bitcoin without needing your private key, so why shouldn't they be able to give you altcoin without knowing your private key?
To exercise control over that amount of "free" altcoin you may need to install an altcoin wallet, or signup to an online wallet (the least safe sort of wallet) and enter your word-phrase / private-keys into that altcoin wallet. To be safe, you should only ever do so after moving (control over) your Bitcoin to another wallet with a separate new private-key derived from a separate new word-phrase.
Super Bitcoin - what you need to know - covers how to safely claim forked altcoins