Are you sure you didn't sign up to a phishing site??? As someone above mentioned, those don't look like the official emails. You could try send a small amount to one of the addresses in your wallet as I believe you get a notification from Blochchain.com once a payment is received and that usually contains your wallet identifier, assuming you set this up and you didn't sign up to a phishing site.

Did you have the recovery seed? If you did you should try recover the wallet but make sure you're on the right site or use a different wallet to recover your funds.