Very similar experience to those described below. If the same thing happens to you, keep your correspondence and request a charge back on your credit card. Don't let them steal your money.
The app has never worked despite being installed exactly according to instructions. They stuffed me about for 11 days telling me that someone would respond within 24-48 hours' before finally admitting it was an iOS issue. When I asked for a refund they refused because I'd used a coupon code offered as standard on their site. This is despite never delivering the service. A total scam.