where is support? contact… well i say it here. there should be solution for each task… so u could continue learning…!!!
I don’t know if all challenges have a solution if you use the “Get a Hint” button, but you can always use the “Ask for help” button to ask help in solving a challenge here in the forum
Also, you don’t need to do the challenges in order, if you can’t solve one go to the next one from the Curriculum and try again in an other moment (or wait for the help from the forum)