I have a Bitcoin wallet which I signed up for in early 2013.  I put some Bitcoins in it,  and then I forgot about the wallet for awhile as I was distracted by other things going on in life.  I tried to get back in the wallet this year,  and I found that I could not get in it.  I still have my password.  I still have my screen name/alias.  I still have my mnemonic phrase,  which is 15 words long (it is my understanding that Blockchain.info has since changed to using 12 word mnemonic phrase). 

The only thing that I am missing is my wallet ID number.  Unfortunately,  I lost access to the email address that had the email from Blockchain.info that had my Wallet ID number in it (I called the internet service provider from where I had the email,  and they claimed that all of my emails were deleted,  and there was no way to retrive this email,  or to reactive this email address). 

When I got the Blockchain.info wallet,  one could sign into it with a screen name/alias,  and a password,  but it is my understanding that sometime after I got the wallet,  Blockchain.info changed the sign up process,  to where you had to sign in using the Wallet ID number and the password. 

I found a link for those who had the 15 word recovery phrase to be able to find their password.  Since I never lost my password,  I did not really need this,  but when I entered my 15 word recovery phrase,  my password did come up,  so their system obviously still recognizes my password. 

Here is the link to which I am referring:

https://blockchain.info/wallet/forgot-password


So what can I do to regain access to this wallet?

Any help would be much appreciated/ 

Thanks.