Double billing

I was contacted to inform me that I could come in for an early upgrade of my cell phone contract. Now they are charging me for 2 devices. I've been with Autopage for more than 20 years and have 4 contracts with them. This has never happened before but they now say I have to pay the full 24 months for the old phone as well. I was definitely not informed of this when I upgraded. I've since been back to the branch and I called the head office without any joy.<br> If this is how they treat loyal customers I'd rather take all my business somewhere else.