Return of mobile device

Hello I have attempted on4 seperate occasions  to return an unopened unused mobile device and now as of yesterday the 14 day return window expired.  I have been given the run around with misinformation from 3 different live chat agents, twice by live agent phone call, and once in store. Each time i wss told not to worry and that the issue would now be resolved, when in reality the issue was/is not resolved.  My first attempted contact was on 11/14, I was told a return label was being sent to my home and a carrier would pick up the return . Second attrempt on 11/17 -After not receiving said label i made contact again with live chat agent who told me the previous agent have me wrong information and procededd to instruct me thst i would need to do the return in store which i them proceeded to make an appointment in store for the following day.  At the store I was told the return would have to be processed with an agent over the phone.  After leaving the store and once Again calling and polietly explaining my issue and frustrations , the call was "disconnected" and no call back was attempted by the agent. Mine you my call back number had been twice confirmed with the agent.  That was yesterday 11/20 which was also day 14 of the return expiration . I will be awaiting your response plese