i dont know what to do, my debt is swirling outta control?!!?

where do i start to try and rectify things, the bank call me every day to inform me i am over my overdraft and they need a payment! i'm getting charged for being over it, i have a job but at the moment i dont earn enough to pay off the interest on my credit card let alone start to pay off my overdraft! arggggghhhhhhhh