aquarium hardware No Warranty on items offered but guaranteed to work, Internet

I purchased a set of lights for my aquarium. Why they arrived and I set up the lights, they didn't work. I contacted the company i had purchased them from and they sent me out a replacement ballast. It also did not work. I tried to test the product and offered to return it. Although i was within the 7 day time frame for returns, no return was allowed. Now i have worthless product and have a warranty that is worthless. Upon asking the site for help on how to possibly make the lights work i get attitude and excuses. I just need my lights working and was sold bogus chineese garbage. all that site sells is junk from a container that came from china.