British Passport for a daughter (non British Parents)

Hi guys, I've got this problem.
Basically I applied for my daughters first passport (I'm Latvian, my fiance is Finnish) I lived here since 2006 (from being a kid) and I know that my daughter will count as British if I'm from EU and lived here for 5 years so I applied.

I applied online, and sent declaration with my bank statements from 2009-2015 (which proves that I was in College and statements clearly show my EMA coming in (which can only be paid if you get paperwork signed every week by your tutor) and it also shows that summer times I was working and I was getting student finance money (proving that I was going to Uni)
I have also sent my passport,
My Degree certificate from University,
My Student Finance letters,
My P60 for this year,
and My Payslips from first proper work after Uni.
All this was received by them on 10th of April

Around 2 weeks back (From today) I've had a letter that they need more information:
My parents passports (my mum is a British citizen since last year), my Parents HO documents from their first work, my Birth Certificate (translated) and letter from University confirming start and and finish day.

I was already not in the greatest mood as my Parents leave in Leeds (i moved to Swansea because of the work and family, and its not so easy to get stuff over) My parents came over the same weekend coming and I was able to pack everything up and send everything over last week (Happily I've had a Student certificate from Uni stating start date and finish date which i took out earlier for my council tax needs)

Now I was sure that they definitely got everything! As this is a super proof all together, and boom! Today i've got another letter than they need my parents P45/P60s from when they changed their job (they didn't change the job, as what happened the company name changed) and again "Letter from School stating start and finish date" ...

Are they just messing around with me? This kills me so much, that i'm thinking to leave it all and just apply for Finnish passport.

How old were you when you initially entered the UK with your parents?

I was 12, now I'm 21 (soon to be 22)

You probably attained PR as a family member of your father or mother, after he or she exercised treaty rights (eg worked) in the UK for at least 5 years.

Therefore, your child is automatically British.

Okay that makes sense, but they are asking for way too much documentation, when they can easily see that I was in college, university etc and making me ring my college to ask for some kind of letter now, as well as for unnecessary documents from my Parents. They already been processing this application for over 6 weeks, and asking for more information that I think they don't need.