How to log in to Adobe Stock while I was previously Fotolia contributor? Added detail is that I'm from Serbia, so when Adobe acquired Fotolia, Serbia was not supported by Adobe. So I couldn't access my account.

More context in addition to the title - I tried several times during the years to login. In the meantime I lost my Allegorithmic Substance Designer and painter licences when they were bought by Adobe as well, so I put it all on ice and waited.
Serbia recently entered SEPA, so I suppose that should help with the overall situation.
The problem is I cannot access my account and am stuck at login screen - giving me an error anytime I try to log in.
 

This isn’t my primary source of revenue, so it was never especially urgent for me to resolve but on the other hand, I am receiving info in my inbox that some of my assets (that were listed on fotolia) are selling from time to time.
What can I do to access my account - or what should I do to transfer my Fotolia Account to Adobe Stock, finally?