Is this right?

I moved into a new build 15 months ago. I was told by my builder (Bodgit and Scarper) that the boiler was under warranty for two years (Ravenheat Little Star). It broke down over the weekend, no hot water and no CH. It seems there is no pilot light at all. I rang Ravenheat and they said that ths paerticular model is only guarenteed for 12 months!!!!.....so mine ran out three months ago. I have just had to call out a plumbing firm (who incidentally have never heard of the Little Star!) and have just been charged £300 for parts and labour costs!!!!!..............surely Ravenheat can guarentee boilers for longer than 12 months in this day and age. Also, does anyone have any suggestions as to how I might take this forward. i.e either a samll claims court for the builder's incompetence or Ravenheat's idiosy in only giving a boiler (and their good name) a 12 month life span!!!!!!