Hello @jenisavescu and welcome to our wonderful community! If you are playing on an iPhone you will not get level 5916 and above until next Wednesday. People playing on mobile devices (I am one of them) are 90 levels behind people playing on a computer with the Win10 app so at this time 5915 is the highest level mobile players have.
Just be patient and you will see the new levels next Wednesday. I am glad that you are enjoying the game and eager for the new levels.