Login error message (Authentication error)

Please i need help. I tried to log in to my netlify account but was given an authentification error message " Authentication Error

Authenticating failed due to the following error: **We already have a registered user with this email address. Log in to connect your GitHub account."
i have changed my password as recommended from other solutions, but still encounter the same message.

please i reaaly need a response to my issue as ive not been able to submit my work and the deadline is approaching

Hi, last I checked you haven’t written to our helpdesk. Can you please do that first? When you do please share the email address.

Hi, Thank you for your kind response.
I have written to the helpdesk now. My email is: anitadedokun@gmail.com . Thank you.

Hi, thanks for your patience. Mark responded to your ticket. You will need to verify your identity to continue using our platform. Please respond to the ticket if you have any further questions.