Hey there, @sofidila
Bo here from Shopify Support!
I am sorry to hear that you have been experiencing issues contacting support, chats do not close as we provide 24/7 support. I will be reaching out to you directly via email to authenticate you as the owner of the account and help you with this, I will just need you to email me back with confirmation that this is a change that you still want to go ahead with.
When on the Help Centre page, you should see Support > Contact Support in the main menu or there's a Contact Shopify Support button near the end of the page. The Help Centre will try and suggest guides first to resolve your query, however, if none of these suit your needs then please keep clicking the Contact Shopify Support button at the end of the page instead.
In some cases, Chrome extensions and cache can interfere with the Help Centre's login/authentication process and you might experience a "loop" when trying to contact our support. If this happens, I'd recommend clearing your cache or to log out of your Help Centre account and access our support as a guest instead as shown in this short video. Our advisors can authenticate the account later if needed or our Facebook and Twitter support would be happy to help instead. You are welcome to contact us here on Twitter or here on Facebook.