Takealot.com — takealot still refusing to refund me for my decoder

I need serious help, a complaints board or something...I cannot deal with these people anymore.

I bought a R599 DSTV decoder with free installation from Takealot.com

I struggled getting the decoder installed due to the fact that this decoder does not come with an installation voucher. I called Takealot to ask for assistance regarding the installation and their employee who had promised to call me did not call me back. I even called Multichoice, and all the installers were of no help. Nobody wanted to touch that decoder...there was no voucher.

Seeing that I was stuck with a product that was not working for me, and no one could assist, I decided to return the item to Takealot.com. The options that you are given that you select as reason for your return are not clear, so I selected the option that says unwanted item. Takealot has declined my return because they say,  Multichoice have requested that takealot should not facilitate on their returns any longer, customers need to contact Multichoice regarding any difficulties concerning their decoders. But where did I buy the decoder? and who has my money? They want to return the decoder to me which I do not need anymore because I have bougt a decoder from Game which was installed the following day. I dont think they understand that I am not returning the item because they failed to assist as the person whom I purchased the product from. They are saying i failed to log the return within 7 days of purchasing it. I did not see 7 days on their policy, I saw 30 days on an unwanted Item. What happened to a customer first? I am saying they should refund me because, I tried to get the item installed on my side, I have paid them and have even seeked help from them as well. I have played my part. What does Takealot want?