This site is mainly for support community to community, not for Azure services support. If you need specific support for your Azure account then you should continue to use Azure Support.
I'm not clear on how you opened service requests in the past but the feedback icon is still available within Azure Portal for getting help with. For an actual support request for which you have a plan then go to the search bar at the top and type in support. It'll quickly take you to the Help + Support blade and at the top of that is the option to create a support request.