I been having pain in the back of my ankle for over a month now due my new shoes should I not earth them n what it causing it?

Podiatrist. You need to bring the shoes in to your podiatrist and let him evaluate your foot for the architecture of your foot as well as the fit of the shoe to your foot. It might be a simple fix. But you need to see the podiatrist first.
Achilles tendonitis. It sounds like your shoes are irritating the achiles tendon. Switch shoes.