Blue Hippo I was promised a new Dell computer and never received anything from the co. They just kept giving me the run around. Internet

I saw Blue Hippo's add in a magazine and called the co. The rep I spoke with took my checking account info and processed an initial payment of $99. This was Sept 12 2008. I made weekly payments of $34.99 for a total of 28 weeks. I was told on my initial ,so called recorded call, that after 13 payments my computer would ship to my home. 13 weeks came and went ,no computer. I called Blue Hippo the end of December and after over an hour and a half of being on hold I was told my computer has been shipped. I checked back at the end of January and was told it will be ready to ship that I have fullfilled all my obligations. The middle of February I called again. I was on hold trying to get through and when I finally did I asked for a supv and the rep hung up on me. I went online and requested then to cancel and was told I would get a store credit which I felt was unfair because I honored my end of the agreement. Blue Hippo's store credit consist of sending them more money to cover taxes and shipping to get an item that you have already paid enough money to get. I am sorry I personally will not send this co another penny. They have already showed they are not trustworthy. I would like assistance in getting my money back.