I found out my daughter’s name and DOB via a CSA letter

I gave up my flat to move into a bedsit because we found out she was pregnant so i could help with the cot/pram etc so was giving my ex 300 a month for my boy, then the arguements started & just before he was born she went to csa & the 300 i gave her after he was born got reduced to 200, i did tell her not to but she wanted the csa involved.

me, like an idiot went back to her & now we had a girl but when she found out she was pregnant she dumped me a month later. she now has a 2 bed house & takes 1500 – 1700 income a month while i had to get rid of my car because i cant afford it, i now ride a bike & also have to rent a room no matter what because i gave up my flat for her & to top the lot I FOUND OUT MY DAUGHTERS NAME & DATE OF BIRTH VIA (A LETTER FROM THE CSA)stating how much more money i need to pay!!!!! i mean WTF WTF WTF!!!