Cancellation of Premium subscription

Hello, I signed up for Premium trial from iPhone. I barely used it to check for one or two items after subscription and I didn't feel it is needed. However, I lost my iPhone a week ago and I tried cancellation from my Android but wasn't able to. I kindly request you to cancel my subscription and refund the amount to the source. I will really appreciate that. As a feedback, I suggest you to make management of submission available across all platforms.