Goods not taken back by the supplier

I bought headsets called \FreeRein reflect\". They are bluetooth devices. Fully paid for them for R599.90. <br> <br> I got home and charged them and used them, only to find out that they give me an unbearable headache. I called the store and they said they will take them with no hassle, and I will be charged 15% for handling them. When I got to the store, I was told I could not return the goods for hygienic reasons despite the fact that the ear plugs that come in contact with the ear are replaceable. <br> <br> When I got to the store, the manager could not be reached because she had a training meeting, and I was told to come the following day. "