I am in Lanzarote. Call barring is off, roaming is on. I can not send text messages. I can not open a voicemail message, it is asking for a pin, I do not know this. It asked me to call 789, but this rings and cuts off. How can I sort this problem out...

I recieved an email yesterday at 3.42am saying that I had changed my password-I DIDN'T. I do not know whether this is a scam email or not. I have tried to access my account. I can not remember my password. I have clicked the forgotten password link, ...