How can I help my bad acne?

Okay so I am 13 and I don't have bumps on my face I think I just have a lot of acne scars. I do get pimples every now and then. I have a lot of blackheads on my nose and some on my chin I hate that I want it gone. I use Stridex Maxim strength pads 3 times a day and I wash my face once at moisturizer toner and I exfoliate about once a week. I also have scars on my back I want them gone by summer how? PLEASE HELP!!