Note : Guys do not ever try to use the link provided by Op to purchase this service.
Op is a Newbie with no trading history so can't be trusted. Use a trusted escrow to deal with him
Also there is no way to make a refund on purchase transactions while keeping the goods with yourself. Don't get fooled by a Newbie
It is, you just call them say you bought and app froze.. If you got back i you never got your stuff what you bought. Most likely you will be refunded