@pilarova.nikola please edit the post and delete out the email address you posted. Post your email address in public makes you a target of phishing attacks and hacks.

As for Freebitco.in, I am able to log into my account on the very first attempt without any problem at all. In their thread, I see some complaints similar to yours in the past few days. Unfortunately, we can not really help you ascertain what exactly the issue is. The support should be able to give you the right answer.

Have you tried contacting their support through the contact form under FAQ?