I purchased already 8.79$ Package for genie app. But Isn’t useing now. Could you help me.

If it isn't working, on the original receipt would have been an invitation to 'Report a problem'. Report your findings as the problem and wait for Apple to get in touch.

But if you have stopped using it, then that is no reason for a refund.

If this is a subscription you want to stop, read this document for instructions on how to cancel the sub.

https://support.apple.com/en-gb/HT202039

"But Isn’t useing now." <-- I do not understand that so I do not understand the problem you are having.