Online appointment system date for Residence Permit

Hi all,
I read all the answer in  forum but I can't find my questions answer. i get can 90 days visitor visa.
A. online system how many days or months give the appointment date after i fill the form online for submit application ? 
because if the system give 2 months date then i have live there 2 months.
B. How to show the home address if i didn't live there any idea ?

I found 2 agency I'm not sure they are good to help for submit the application or good in the service.
If anyone heard about this agency or apply the permit from them please share with me.


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