Different colour coffee and side table

I have complained about the fact that the coffee table and side table's colours are completely different. The colour of the coffee table is the colour that I have ordered. I have sent picture to the shop and to the cell phone of the sales man. He then asked me to bring back the furniture to which I said no, they can come and fetch it. I then called twice to ask what is happening, no one is coming back to me. I then went to the shop on Tuesday the 10th of March and spoke to the assistant Branch Manager who promised to come back to me with an answer. We are now on the 14th of March, still NO ONE has come back to. I told them if they cannot fix it, they need to collect it and give me my money back. This is really unacceptable. I have had the furniture for more than a week and cannot use it.