Tracker App & Web Portal Useless!

I have been a tracker customer for over a year. Have recently added a second vehicle onto our policy. All of a sudden the App for iPhone which I have used for the last year stops working and the website portal also becomes completely unresponsive! I need to be able to track these vehicles in real time and this system used to work! But not anymore... I have tried to contact the call centre, however after being on hold for 15 min I hung up. Someone call me urgently!