Matrix Benoni

I visited the Benoni store today. The manager a Keith gave me advice that I cannot split an ethernet cable in two and that I can only use a splitter that is connected to power that will split the ethernet cable. I bought a 50m ethernet cable as that would have solved my problem as would not have to split an existing cable and would be able to reach my access point with the 50m cable. I went on the internet after leaving the shop and found ethernet splitters to split one cable to two with out being connected to the power. I went back to the shop and asked to return the ethernet cable as the advice your manager gave me was incorrect and spent money because of his advice in your shop. I was informed that they do not take ethernet cables back, and if I am unhappy, I can email their complaints department and maybe I will get a store credit. I acted on wrong advice from one of their employees that cost me money. The box of the ethernet has not even been opened and was out of their shop for less than half an hour. I do not want a store credit and want my money back. I think it is extremely unprofessional that an employee gives wrong advice that they do not take responsibility and then refuse to refund one of their products that has not even been taken out of the box or the box has not even been opened.