I've downloaded app for international calls. I've topped up "the card" so I could spent the money for international calls. After some time of international conversation, the money has been taken from my account in app and also I've got a message from ID, that I've used 100% of my minutes allowance (I have unlimited minutes and texts) and I'll be now charged 40p/minute for every standard UK call I make. My question is, why I'm charged for international calls by ID, if I'm using the other app for international calls which I'm already pay for???