Guild Wars 2

So I contacted the support team about this problem buuuut they didn’t help much.

So, I accidentally deleted the whole e-mail account (thanks to intoxication and Google’s failed child security) associated with my GW2 account, so I for as an example, I can’t get the Order ID/invoice number which would be required for me to validate my identity so I could change the e-mail associated with my account. I’m really worried about some security issues that come with a legitimately dead mail.

Would I be still able to request for a change, or do I simply have to deal with this?

Try it. I think that the support team will be helping to establish the ownership and in changing the email. Maybe there will be some problems in doing so, but they will try.