Yes it will be enough, if there is some discrepancy with what you have booked yet you can confirm that what you're saying is what it said when you purchased it, then it will be more than sufficient.
Also, note down anyone's name at EY that you have spoken to that has confirmed that you were correct, as they would have put notes in your booking to say what was advised to you as well.
If there is some confusion if say, you ask for a refund or want to change the booking with no penalty fees, then these documents will act as your evidence and there should be no problem.