How can I cancel an unwanted Packeta app subscription before invoicing?

[Woolwork]

I ran into such a problem that I accidentally subscribed to an application. they should invoice me on March 11th, but I received an invoice on the 6th that I don't want to pay. I want to cancel before 11, but I can't find it anywhere. I would like to request a new invoice without the subscription. the app's name is Packeta. Thanks in advance