HELP

Im in Spain I just came from the Philippines and I tried playing call of duty and it switched to Activision and thats NOT the problem I tried playing it and I can't log in (I already have an activision account) It keeps crashing it keeps leaving the app everytime I press the Facebook option to log in i can't log in it just keeps leaving the app, help any help please I'm dying with our call of duty how can I fix this?