Game Tevo representatives refuse to give a refund

We bought a Bennett Read AeroVac at a Game Store on 28th August 2017. After a couple of uses the rubber on the broom accessory was off and the motor would cut out during use. Apparently according to the Tevo representatives, this is a safety feature!! This product is not suiting our use and the quality is not what we expected. I managed to eventually have an opportunity to return to the store and I tried returning the vacuum to the Game store on 13th September for a refund but was told by the Tevo representative that I missed the 14 day refund period. Apparently I was suppose to have been told of this when I purchased . I was definitely not told about this condition. In fact there was no Tevo representative that assisted me. The representative refused to do a refund. My wife then called the head office and spoke to a Daniel and he said that we could return the vacuum, We drove to a different Game store and was once again told by the Tevo representative that they cannot provide a refund. This is ridiculous and I've now been to 2 Game stores and not happy at all. We have had this vacuum cleaner for less than a month and after missing this "14 day refund" period that I was not told about, I am now being told by Tevo representatives that I am stuck with this product that I no longer want. I need this resolved please.