Up until around 48 hours ago, Viber was working grand on both 3g and Wifi on my iPhone 5. Now it has stopped working completely and will not send a text and when I try to calls says 'there seems to be a problem connecting to Viber's service'. This is on both wifi and 3g. Internet works fine otherwise as do all other apps. I deleted and reinstalled Viber and now it can't even sync my contacts. I'm in London and my sister is in Texas for medical treatment and it was my only way of contacting her. I would be so grateful for any help!