Distance / Absence

I have been in a long distance relationship for 3 months now. I am very serious about her and although certain changes are required on each side to spend our lives together we are both slowly acomodating to the change.

Although these 3-4 months may be looked upon as short time, we both are mature enough to know and understand how we both work. Since day 1, we have spent many hours every day talking with each other and getting to know each others personality and ways.

Our Parents do not know yet about us as we are waiting for the right time, which is by December latest to tell them.

Ok the above was kind of a brief background to our relationship.
The issue im having is shes been gone for a holiday for over a week and not contacted me since.
She initially told me it would be hard to contact me as her sim card doesnt work in the country side she is in and she cant use landline as her mum would find out and shes only gained her mums trust back (1 year) since, in her perspective, was off track.

Before she left I asked her to try and make means of communication by one week latest and she hasnt. I saw her brother online and asked about her well being. He said she was fine and she couldnt get in contact as she was tied up with her family and will do as soon as she can. Its been 1 week and 4 days now and still no contact.
Its really getting to me as she said she would have and she hasnt.
I dunno if I am over reacting but she promised she would!

How should I be handleing this situation?

Why didn't you message her...?

Well shes come online after me. Shes just kept quiet. She didnt call, text or nothing. She should be messaging me. If shes been able to go facebook since comming back shes capable to message me, especially after all this time without not 1 bit of commuication, even thought she said she would have.