If you think 24hrs is bad, try a week now for mine!
I don't enjoy having to vent about it, but this is getting ridiculous.
A few weeks back, I finally added a cell number for SMS via the Coinbase site. Unfortunately, now I can't use that number and Coinbase logged me out before I could change it. I couldn't use Authy to add it, since I don't even own a cellphone! I never will own one of the wretched things either. I joined Coinbase before they even had the stupid mandatory 2FA and was unpleasantly surprised by its forced addition. Every other place I have been, has an opt out for 2FA and I always opt out. So apparently, since I added the number via Coinbase, I can't change it now! Their only available option is to change it via Authy! ARG!
I replied to my initial support ticket about the 2FA last Friday, sent a new request on Monday and even tried the public support on Thursday morning. Still no response from anyone. I am just completely locked out of my account and my BTC. This just makes me hate cellphones even more, lol.