Not returning my cellphone and charging me for it!

This is my third complaint after I've been to Autopage several times and had several conversations with them over the phone. How is it that this company is still in business?? Charging clients such as myself extra on their accounts without any written documentation or my signature?? No one is getting back to me and are typically just ignoring me! Now Autopage has suspended my number for probably the 4th time already and the issue is still unresolved. The manager at the Somerset Mall branch can barely look me in the eye when I'm there as he was the one who informed me that I will not pay any additional charges for a second hand phone. I have still not yet received my Blackberry phone back yet and now they want me to pay??? Did someone sell my phone or what is going on here and why can't no one give me an answer. Where is my phone? Why do I have to pay over R 2000??? Why am I being suspended if I paid my account??<br> I need answers!!!!<br> I am utterly disgusted in their customer service and the way I am being treated!!!