No follow up or feedback after issue was logged

I have tried to return a handset since December 2015 . As per agreed contract stipulations that your sales person read to me when I agreed to this contract I had 7 days to return the handset if there was something I was not happy with. So I got the handset on a Friday and phoned you on the Monday to come and collect the handset because I could not make any calls with the device. Your website conveniently forgot to include the fact that I could not make calls with the handset without connecting it to a cellphone of a similar make so ultimately the handset is quite useless to me. Now I have provided you with the reference number (OBF173769) and requested on multiple emails that you come and collect the handset. On 05 February 2016 when I first logged a complaint on Hello Peter an attempt was made to collect the device but I was not in the office late afternoon and I understand this was my mistake. Since then I have again just being ignored and I have the weekly emails to prove it.