I need a refund for my subscription to imdbpro

i use the free trial for imdbpro for one day and have never use it again ever since. i was shocked to find out that imdbpro use the credit card info on my amazon account because i did not know that it has acces to it to charge it for the paid subscription that i did not want to use. i needy a refund for this since the card on the amazon acc is not mine and i don't even use the subscription of imdbpro since they charge it.