Unfortunately, really poor experience for me :( I ...

Unfortunately, really poor experience for me :( I ordered an Iphone 6s which i received a month after i paid for it. On the web page it said it would take 7 days (at the most) before it is dispatched and sent as next day delivery, however mine was 3 weeks late. I tried emailing and didn't get very much info back from them! Once i got the phone through the post, it looked lovely. Worked fine, however it would loose all its battery life within an hour or 2, and the screen became a little unresponsive, So i messaged them back asking to return as i think its faulty, got quick response in the beginning, i emailed them again trying to find out some info on how to send it back and change it for another one but haven't gotten any reply in around a week, i have emailed a few times now but still nothing!! Iv emailed again asking for a refund and some info on how to return it. Its very difficult when everything takes so long without any clear information about what is happening!! I will continue to try and get hold of them. Such a shame really !! -.-