Shocking service from cellc and *****ing my money

I have been a cellc client for the last 16 years. On November I upgraded one of my 4 contracts and received the new phone and watch but the color of the watch was incorrect. Called them and they collected the package the next day. After that I heard nothing back from them even after 10 plus calls to there customers care. I have been billed for the last 3 months for devices that i dont even have. This is shocking service from such a big service provider. Is there anyone that can help me with my issue?