Thanks for your reply Cat, unfortunately none of your suggestions helped me. Last year when this happened Nordeus repeatedly said it was Facebooks issue however I believe that they simply have no idea what the issue is. It is weird that it happened to me in October last year and I was without the app until April 2014, and now it has happened this October as well. As far as I'm concerned if a company takes your money for a product/in-app purchase/etc. then they are duty bound to investigate and solve the problem regardless of whether or not they are not the cause of the issue. Don't offer Facebook integration if you will use them as an excuse for problems and say you cannot solve them. If it was a Facebook issue then surely many more users would be affected.