problema con reembolso

I purchased a month's subscription to see if it was working the service correctly without buffering, and I got 7 day refund; after one hour, since it was working properly, I bought the yearly subscription when I wanted to cancel the one month because I got the yearly subscription, they reject to refund me without any explanation, with you won't be refunded. The service works great, but they don't have any trial, and lack of transparency.