Greetings,
We are sorry to hear you are unhappy but play store subscriptions auto renew, you would need to cancel this with the Play store directly.
https://support.google.com/googleplay/answer/7018481?co=GENIE.Platform%3DAndroid&hl=en
If you need any further assistance you can contact us directly as well: help@itranslate.com
-iTranslate Team