Bad service(need a replacement phone)

I requested for an upgrade and I had the most horrible experience with Cell C. By the time I got my upgrade a IPhone 6S I only had it for 1day and I had to it take back because it was faulty, Since then I have been without a phone. OBF177698. Please advise if its possible that I can request for a replacement phone ASAP or my contract to be cancelled. Month end I will be billed in full for a devise and service that I only used for 1day. I have been a loyal client of Cell C for more then 8 years and this how they repay my loyalty. Because no one it taking my complaint seriously cause I really need a phone. If someone eventually decides to help me please call me on *** or email me on [Email Removed] cause I do not have a phone