I had this problem with Tangerine about a week ago and called them and they fixed the login issue over the phone.
I attempted to login today with the same email & phone number and it's giving a error again…WTF Tangerine.
"We were not able to verify your account with the email address and mobile number provided. Please check and try again. If the issue persists, please ensure your details are up to date by contacting our customer support team on 1800 211 112."
Whatever you do, don't call them.