contract upgrade

I upgraded my contract on 11 December 2015 but on this date 22 December 2015 did not receive the new phone. I spoke to the call Centre numous times but they seems to be unable to help. firstly, the phone LG stylis is not in stock, not in the shops or at the warehouse. the are waiting for LG sent the phones no one bothered to tell me that. I called them 4 times yesterday and ask can we change the phone because im not prepared to wait for months. the lady said she cant help me she will ask the person who did the contract to call me back before the end of the day which did not happen. I call again this morning to be told the same thing that the 4 consultant said yesterday. the lady who did the upgrade is suppose to call be back and that did not happen. I am very upset because it seems they are just not interested to help!