The easiest way is to cancel your Premium Membership and payments is via your automatic payments dashboard in PayPal.

Once logged in to your PayPal account and at your automatic payments dashboard, you should see payments to Impact Images or PhotoBizX and an option to cancel.

Let me know if you have any troubles –

If you're happy to share your reason for cancelling, I'd love to know and would really appreciate your feedback. Was there something missing you would have liked to see as part of the membership or interviews that I'm missing?

No pressure if you don't reply and I wish you every success with your endeavours.