But AFAIK, blockchain.com doesn't use change address derivation path so,
It uses change derivation path. I once needed to recover some forks and I had some funds in my change address (Internal/External 1-0)
thanks for the help i'll try again. but yea that was for sure there support but it was in 2016 i have a long back in forth with them and then they stopped answering. i tried talking to them again more recently but they just ask me for xpubs and i know how to check that already.
I would try everythign if I were you.
Somehow you may not be able to find the proper derivation path, or the proper combination of the right derivation path + internet/external + account number.
So I would try to download another wallet and try that.
I suggest that you download Samourai app for android, insert your 12 words, and lets see if some balance shows up.
https://support.samourai.io/article/7-importing-a-wallet-from-another-appStep 1 - Determine compatibility
Samourai Wallet is compatible with all Bitcoin wallets that support the standard BIP39 & BIP44. You may need to check with your existing wallet provider to ensure they support these modern standards.
This is a partial list of compatible wallets:
Mycelium Wallet
Yallet
Coinomi
Blockchain.info HD
Airbitz
Electrum HD
Multibit HD
Trezor
Ledger
Bither
Step 2 - Install Samourai
Install Samourai Wallet from the Google Play store onto your Android device.