Overataying in visiting visa

my 3 months visting visa vality is upto november 14th...i tried to renew  it this month before october 8th.. bt i failed to renew it.. so i have been overstaying here for 14 days..so  i wish to return my country back...
what are formalities need to be faced by me  before going to airport.......

Go to NPRA.  They will assess and levy a fine.  Pay it.  Then go to airport and leave.

thank you so much................. :)