Awful Customer Service with Upgrade

I was initially most impressed with Autopage's service while doing my upgrade online. I did the upgrade online on 24 August 2015 and received the new contract phone within 2 days of upgrading, but unfortunately the incorrect colour phone was delivered. I have been calling every week to follow up as to when my new phone will be delivered, but every time the call centre agent says they will speak to their manager or it is being escalated or it will be delivered next week and they will phone me. I have still never received a phone call back and that is why I have been having to contact them repeatedly without any joy. It is now 9 October 2015 and I have still not received the my phone, but am paying for the upgraded contract and phone that I do not yet have.