hi i had some HIDs on my car for 8 months, after 2-4 weeks one side failed. I was sent a new one and this was fine. Now 8 months later the other side wont work? i have been sent a new ballast again and this sometimes works-and sometimes turns off? My original working ballast works fine so i have ruled out faulty bulbs/connections?

Any advice? surly i cant have been sent a faulty ballast again?