Blocked icloud email address
I have booked a holiday with LastMinute.com with an email address that has compromised and blocked. I cannot get into the old email account to get my holiday confirm email and the email address is so old I cannot remember the security questions. I have a new icloud address and I want the emails from the old email, locked, transferred. Can I get anywhere with anyone!! LastMinute.com simply don't answer and I am pulling my hair out!!
iPhone 6, iOS 12