Just an update on this.
In the email address that I originally thought was associated with the account (and one which they deny is linked to the account) I have found a number of emails.
The first, in 2014 was a welcome to my wallet email. This has the wallet ID which matches what i had written down.
There's another in 2017 asking me to verify the email (whether I did or not I have no idea)
Then there were two emails in late 2017 asking about attempted log ins from a mobile phone.
A final one was sent in 2018 regarding EDPR updates.
So I have sent another message to blockchain customer support.
If you say the last message was in 2018 and you may not have logged in since then there is a high possibility that they deleted your account due to not logging in for a long time or due to new wallet updates.
This is a message I received stating the need to activate the email:
https://www.talkimg.com/images/2024/03/10/yimtJ.jpegOr there is another possibility, since you say that you logged in from a mobile phone, perhaps someone other than you logged into your account and changed the associated email.
Make sure to check if those emails are from the official blockchain.com/info domain and email. Because I've got an email that have been never published to the public but after registering to websites like them, I've received the same email phishing attempts and I have never confirmed and clicked any of those links when they ask me to. It's best for osiris to just confirm it with the support so that he won't be a victim of any potential threat of phishing/scam. Good thing for me that before everything and realizing things for this web wallet, I was able to withdraw everything from them.