I purchased an online subscription for three months to an exam question and answer package. That allows me to complete mocks tests for the subject I'm currently studying. I'm a few days into the subscriptions but not really getting along with it, no particular reason. Am I able to go back to the company and ask for a refund of the amount minus my pro rata use over the last few days? Is there anything in distance selling I could use? Or would I have to justify it?