Family

Hello my name is Elham I am 17 years old from Afghanistan I live in Germany I want to invite my family to Germany I have for 3 years visa 

I mean I have inhabitancy for 3 years right now cuz I am under 18+ I am allowed to invite my family to here I have 2 sisters one small brother and just my mom my father he is not allowed to travel how I can start for this hard thing in my visa document they write I can invite them in 3 months I already gone 2 months I just 1 month the big problem is there is no German embassy in Afghanistan right now and my mom is alone it's hard for her travel alone and I ask some people they should travel to Pakistan or Iran 

It's also kinda weird cuz Pakistan or Iran visa is too expensive for us I am a student right now my mom she can't work and my father he is in bad situation as well anyone can help me please  

Thanks