unhappy client and wants to be refunded

myself and my husband purchased a sub and an amplifier on friday 23th of December at Soundtech in N1 city western cape. The sales person sold both to us and guaranteed us that we will not regret it, however if we are unhappy we can return it. They also said that they do not do installation(which we understood). On Saturday the 24th of December we took it to an installation company and whilst they were busy installing the equipment's the sound faded and it did not sound the way it sounded in a the store. Today the 28th of November we took it back for it to be refunded as we are not happy with the product and it is still in our right (consumers right to return goods in 5 working days). The manager on duty (Leon) refused to do a refund. firstly the person who sold the goods to us was not in today and Leon wanted us to return the next day even though we told him that we came from far (40km) therefor it has to be resolved today. after numerous complaints and wasting of time he went to the car with my husband , checked the sub on another car and told my husband that it is working and they will not return our funds (after they specifically stated that they are not authorized to connect subs and emps to a car) he also wanted us to go home and come another day back when the person who sold it to us is in the store. the client service is pathetic and the way the manger treats the customers is like we mean nothing .

i want to be refunded and to get my funds back for driving up and down due to the fact that the manager on duty could not close the case whilst we at the store. a manager is suppose to make decisions that will benefit the client and not other way around . now i will never advise someone to buy anything at soundtech and i will only speak bad about it where they could have avoided the entire process by just refunding us .