Lost access to main multisite

Hi,
Recently my ISP changed something regarding the SSL certificate on my domain nettisidesupport.no. For a periode of time I was unable to log in as admin. After a while ISP support told me to put in www in front. Then I suddenly could access again. Alway before I had accessed admin not using www, only https.

What I did not notice at the moment was that I was not granted access to the main site with superadmin credentials. I am no longer able to add new sites, or make updates.

When I try to access the network admin, I get thrown out to a new log in window. Then when writing user and pw (superadmin) I am not granted access.

I sincerely hope you are able to help me sort this out! I have full access to DB and ftp - but I have no idea where to start.

Let me need access of some kind - besides superadmin :wink:

Best regards!