Qatar Airways waiting time from verbal to written offer

Hi Guys,
I need a bit of advice. On the 31st of Aug, I received a verbal offer from Qatar Airways.
It's been a little over two weeks now - HR keeps telling me my 'application is under review, awaiting approval'. Does this usually take this long? I dont want to keep annoying them.. but I sort of need to know if I should not get my hopes high. Has anyone ever waited so long and still got the written offer letter?
Quaestion 2: whats the avg total package for a grd 7 role?
Thanks in advance.
thanks for the response
Answer to Q1: Be patient. The company has many applications like yours for various positions like yours to handle.
Q2: You should have asked this question at the time of your interview.