So do I have a chance now to withdraw the funds successfully without approving it?
If yes, then I don't think they might help you but let's wait after 72 hours and see. The rules involving multisigs or in this case coinbase vault are pretty much clear. No approval, No transaction.
But coinbase replied to my another support a week earlier to complete KYC and get verified to help me to change the approval email from their side.But I completed as they asked but after that there is no reply to that ticket, surprisingly I received an response like
Hello xxxx,
That's the end of the response, but they are supposed to change the email right. I am kind of annoyed with their support again that is why I left the funds even if worth few hundred dollars earlier this year.