As a buyer, if you pay or buy something, you expect to obtain the product. In your case, on your website, I bought and performed all the purchase processes correctly, and I see that I have nothing, I only see that status is failed. As you will understand, if I do not claim to paypal and I don't write in your web site, I doubt that I can get my money back, and apart, you do not have a good service of direct attention with the client, because for me, sorry, it is a scam and more for intenert.

So, when the receipt I paid is returned. I will close the incidence.

And you should take more care of your service servers from the purchases used for your app.