ex problems with kid

Hi All,
I was going to put this into parenting but i wanted go unreg for this.
My Daughter is living in the uk and i send money every 2 weeks as maintenance.
My ex wont tell me where they live,i have an idea of the area.I couldnt send her an xmas card.I did see her in November and bought her a present.
I didnt get one either,just one way traffic.

I was brought to court even though i did give money every week,and when they moved to the uk i continued to do so.
Even though they are in the uk ,whats my legal stance??
I do have a mobile number so i can ring at least.

Single fathers most of the time do get a raw deal.