wrong decoder on insurance

A while back I spoke to a Multichoice consultant regarding a box office query on my Explora. After the query the agent asked me if I would be interested in insuring my decoder with Multichoice for a low extra premium, which i agreed upon (I was actually considering it beforehand). This happened seven months ago when my decoder was only 3 months old. Two weeks back my decoder started going crazy and stated that my hard drive is *******, so I took it to Multichoice and told them I have insurance and that they should please fix it. After they checked their system they informed me that I only have insurance for my HD PVR. I was furious because my HD PVR has been inactive for more than a year and sitting in the closet. I phoned multichoice care centre on the same day and they confirmed that the insurance was on the HD PVR and also that the insurance is only 7 months old, even though my HD PVR has been inactive since 2 months before the insurance was taken out. I told the agent that no reasonable person would insure something he does not use and that I cannot be held accountable for another agents mistake. This was two weeks ago and I still have not received any feedback on my query yet.