I couldn’t cancel my subscription, in subscription window the app is not showing. Please advise

Hi ashot84,

Could you please give more information about the subscription ? Did you activate it on Official Apple apps or on third parts websites ?

Try to see from the original guide on Apple if you're missing some steps.

Let us know

Click this link→If the subscription that you want to cancel is not listed - Apple Support

Please read all of the link that I posted. One of the steps in it should resolve the issue.