Run around for returns

I bought a TOSHIBA external hard drive in this store and it stopped working after 9 months. The business owner told me he cant give me a refund for the product after giving me a long run around and than gave me an inferior brand Transcend which had a broken seal. I'm dissatisfied with their service. I've been a loyal customer to this company since I arrived in this town and have was dissatisfied with their service this time. Id like to get my money back or at least a sealed product.