Check your internal txs
https://etherscan.io/address/0x9bb502a813957efd4f9e3c28dfc0433df7057421#internaltx
If you add all ETH you received, minus all ETH you sent, it adds up to the balance.
The internal txs are where you receive ETH through a smart contract, so the transaction “to” isn’t you, hence it doesn’t show up under the “Transactions” tab.
Scam. Don’t click any links there guys.