Website login issues

For the past few months I can't log into my Momentum Multiply profile, I keep on getting an error that the details are incorrect. I have changed my password 7 times now as my profile gets blocked every time, but even when I reset and create a new password I still get the error password is incorrect. And if I finally get into my profile and I log out and try to log in via the mobile app with the exact same details that I just used for the online profile I get the error again that the password is incorrect. Can you please fix this issue so that I can log in and use my profile.