Spent years fighting CSA yet got nowhere

Hi i was claming csa from 2007 where my ex partner refused to do a dna on my son who i just had so csa persumed parentage.

I recived money on/off for abt 2 yrs then when i got a new payment scedual out on i think on the june for the nxt few mths payments 2009 they said i would recive £267 in my acc on the start of nov so i left it for the 10 or14 days it was coz i didnt recive it.

When i phoned up they asked me when i last spoken to them it was the apeial of 2009 coz i had just moved house and gave them my new address the also informed me that i had phone up on the july 2009 changing my bank details in which i didnt change them ave had the same bank account for 22 yrs now i had to get proff of all my statments and send them in then they lost them i had to do it again.

I was told that the fraud team were getting involved for the missing money in which i was over the moon they were going to do that and then i got told someone shut my claim dwn it wasnt me tho so i think there security needs to be a bit tighten up against ex patners who nos there patners ni no it only take a min to get someone to say the are u if they have all the details written dwn in front of them.

Its now 2014 and am still waitting i gave up over the yrs fighting my case as i felt i was getting no where my kids have had nothing in the last 5 yr from csa or there dad i was wondering if anyone else had simmler problems.