This is a common problem in Candy Crush.. Some say it’s a trick of KING to persuade people to buy the next level. Most of the time you will have to wait for a day and then the next level will be available.
One other trick you can try is this closing the game. And then turn of your WIFI and Mobile Data. Then restart the game and you will see an extra option appearing when you choose Level 36. Choose the Quest option and you will be able to play level 36 in Candy Crush Saga.
It’s all about the good combinations. And make special combinations. The way I got passed this level is to focus on making Special Candies (combine a minimum of three candies.) and getting rid of the jellies. Try to get more than two Special Candies and combine them in one move.