I created my account about 2 weeks ago and instantly enabled 2FA. so far I made 3 purchases and two transfers. All was ok.
Then yesterday morning, I logged into my account and to may shock my coins have been stolen, at the same time, the thief also bought two lots of coins,
one of the purchase was flagged as fraudulent by coinbase and cancelled, the other is still in pending status. I tried/still trying frantically to get coinbase to cancel the other pending transaction. As for the lost coins, I'm still trying to get them to refund. This is definitely on their side. There is no phone nos to call and no one is calling me back, why is that ?
I have used traditional banks/credit card online banking for years with no 2FA auth, a cent never went missing. Coinbase that prides itself as secure, this happened in less than 2 weeks.
I strongly urge you if you have an account with them, please move your coins and tell others.
Did you receive a sms or call on your phone for the transaction in question ? If not contact your phone provider and they can provide you with all txt/calls received for a certain time frame. If there was no sms or call ever placed to your phone then you can show this to coinbase and that should be enough evidence that something went wrong.
Do you use the coinbase app on your phone.... if you do it could be that your phone has malware/viruses.
What was the bitcoin address your coins were sent to ??
They have an email form here...looking at the code you can figure out their email address.... http://support.coinbase.com/customer/portal/emails/new
A quick google search also will bring up contact info for their ceo or other execs, as well as the address for their office in san francisco if you need to reach out to them further.
edit: Ultimately getting phone logs from your phone provider would get this solved most likely if it shows no sms/call was ever placed to your phone for 2fa. Also worth asking your phone provider if anyone has made any changes to your account recently.