I used NCS when I submitted my naturalization application (atleast if something wrong I have someone to blame

bec that's their purpose to check if my docs are correct and my application form for £45 fee). I submitted mine last Feb 17 and I received the HO acknowlegement letter after 2 weeks saying that they got the money already

and last friday I had a phone call from Home Office Liverpool to confirm something about my middle name for my naturalization certificate and I asked if my application is okay and he said he is looking through it and seems no prob and I ask again if how long I will wait..he said may be in two weeks time I might receive a letter from them....not sure if it is the naturalization certificate? I know that the waiting time is 3-7 months the most.