but extra attack feature wrote youvcan attack twice when you use attack action and your turn? and ready action says this action trigger like an reaction so you cant take any other reaction
Sure, with extra attack, using only your action, you attack twice. If you are using the ready action, you will spend your reaction to use your action. So yes, with the ready action you can attack twice because you are spending your action.
No, he can't attack twice as reaction. Extra Attack ability reads as:
""Beginning at 5th level, you can attack twice, instead of once, whenever you take the Attack action on your turn." It was monster's turn. "
Dust Devil says you have to choose an unoccupied square as the casting location. You couldn't have centered that spell on your ally.