Flat swing

[Jamie1]

Hi i was wondering if anybody can help i have a flat swing and struggling with the game i am hitting very heavy draws which always run across the fairway or across the greens.
I am looking to correct my plane but dont know when i am swinging too upright or correct and the on the follow through i still go back on the flat plane i was looking for some tips or drills that will let me no when i am on plane and kept me on it until finish.