CNA sold me a faulty laptop (update)

well after buying a laptop almost 3 years that gave me problems, and take it to different IT technician with no success, I just want to let you know that,we were able to find that its actually the hard drive connector that was damaged/faulty and one to damage that has to open the whole laptop to get to it. This goes to prove that indeed CNA sold me a faulty laptop and did not want to take responsibility at the time. I have to replace the Connector, but I dont even know where to find it, as it's a mission to get pc spares/part. Now Im left with the task of fixing it or buying a new one as I dont know if it will really give other problems in the future. And lastly you promised on the last post/review, that someone from the store will get back to me within 48 hours and no one has.