Below standard Service

I purchased batteries via a third party person around March. The batteries subsequently were not lasting even half an hour during loadshedding. The batteries were taken in to Sinetech on 1 December. The feedback we got was that there was no fault. I have yet to still have the batteries in my possesion. We folowed up with a return date and got no proper response. I called in myself 2 days ago and still waiting for Simon to get back to me. Christmas is approaching and the reason I invested in batteries was to mitigate no power not realising the batteries wont even last a year and the after sales service is so pathetic!. So I am not sure what happened to these batteries and would want to know where I stand because I am certainly not satisfied with this service or lack there of.