Why don't you read the mail for a refund?

The contents of the mail is, Hi, I subscribed to Televzr Pro to download YouTube videos, but I accidentally clicked the Cancel Subscribe button and I re-subscribed it. So I checked my bankbook and found that I couldn't get a refund after I canceled it. I ran the app thinking it would be refunded tomorrow. But I can't download the video. Just like before I paid, I got a message. I am not an English speaker, so I am very angry because I cannot find out about this. So I hope you can explain this quickly. I sent you an email yesterday, but there is no reply.