It's been an interesting day with two-factor authentication... I am sure it is quite necessary these days, but in situations where things don't follow the happy path, it is pretty annoying.
Sign in on eBay - we sent you an SMS.
Pay by PayPal - we sent you an SMS.
Oh, eBay had somehow pre-filled the wrong email address for PayPal.
Go back, do it again. Check the SMS.
Hmm... nope. Still wrong PayPal account.
After a Google... Edit your payment methods, clear your cookies, In Private browsing etc. and relink your PayPal account.
We sent you an SMS.
Nope, same problem.
Change the email on your PayPal account.
We sent you an email.
Log into your email account.
Please confirm your login in your Authenticator app.
No, the other Authenticator app.
No, the other other Authenticator app.
Yes, that one.
Ok, go back to PayPal.
We sent you another email.
Ok, we have changed your email.
Go back to eBay.
We sent you an SMS.
Try PayPal.
We sent you an email...