This problem lies in blockchain.info's side so they're the only ones who can solve this. You can contact their support regarding this, I'll leave the links below. But please note that they are currently receiving a high volume of inquiries so you might get a response after weeks or might be longer 
But if you want to access your funds asap. You can import it in another wallet. I recommend electrum.
*Imported Addresses are not included in your seed, and for that you can also use electrum and refer to this guide: https://bitcoinelectrum.com/importing-your-private-keys-into-electrum
Submit a request here: https://support.blockchain.com/hc/en-us/requests/new
Facebook: https://www.facebook.com/blockchain
Twitter: https://twitter.com/blockchain
Facebook: https://www.facebook.com/blockchain
Twitter: https://twitter.com/blockchain
But if you want to access your funds asap. You can import it in another wallet. I recommend electrum.
Import it to electrum and spend it there (You can also view your private keys)
Tutorial: https://bitcoinelectrum.com/restoring-your-standard-wallet-from-seed
*When electrum prompts you to enter your seed, Click options and tick the BIP39 Seed Box
Tutorial: https://bitcoinelectrum.com/restoring-your-standard-wallet-from-seed
*When electrum prompts you to enter your seed, Click options and tick the BIP39 Seed Box
*Imported Addresses are not included in your seed, and for that you can also use electrum and refer to this guide: https://bitcoinelectrum.com/importing-your-private-keys-into-electrum