Refusing to replace broken unit

I am at my wits end. Incredible Connection have been *****ing around for a month now. I took my PC in on the 4th of December 2015. It was a floor model sold to me with viruses on it and it being in some stupid retail mode that you cant get out of. I have sent the computer into Ensure 3 times now. The second and third time I drove myself to Ensure because Incredible Connection told me too. My computer is now unusable, things are in Chinese, my graphics card programs have been deleted as well as my gaming center for Asus and Steam (which all come with the PC and are vital!). Ensure have rejected my credit submission because THEY did a software repair. Incredible Connection keep telling me they are phoning and emailing Ensure yet when I go there no emails or calls have been done. They say they will get back to me yet I always end up calling them. This is pathetic!!!! You guys are breaching the Consumer Protection Act! Enough! Its ridiculous! The computer shouldn't have even been sold to me or anyone for that matter. Sort your suppliers and staff out I am sick of doing your staffs job for them!