glass table defective

I had bought a glass top dinette table from them back in July of 2008 and the chairs have been falling apart every since the screws come out the bottom. They are refusing to replace the table even though we had went through 2 sets of chairs and on top of that the table cracked and they refuse to take care of the problem. They sold us defective furniture and will not give me the manufactures phone number to try and settle this matter. I paid good money at that store and I expect what I pay for and for it to last longer then 6 months. They have very poor business eithics and should not be aloud to get away with this. Please help me I am a single mother and I work hard for my money for some one to take advantage of me. Thank you very much Sincerely Roxanne Judd