Terrible customer service

I recently upgraded my handset, I spoke with Charmaine who advised that within the first 7 working days they would replace the handset if it was acting up. My handset did indeed act up within 3 days. I called immediately to log a call advising that there was a fault with the handset and made arrangement for their courier service to fetch the phone and deliver a new phone. This was 3 weeks ago. To date I still have the faulty handset, Furthermore every time I call the call centre and ask to speak to the manager I get put through to call centre agent thinking that they can fool you into believing that you just spoke to the manager. I spoke with Amanda, Ashley( Manager), Calvin(Manager ), Jerusha ( who put me through to the manager), Charmaine( The initial consultant who has completely ignore my request) . <br> Is this what customer service has become? you spend hours speaking to various people. only to find out that you are still stuck with the same problem . <br> <br> I am disgusted and extremely disappointed