Shocking service

I don't know what to do anymore and have resorted to writing a review in hope of getting my query solved. I changed service providers and am being charged for hardware which was in fact returned. Thankfully I have a copy of the waybilll from Aramax as well as a photo of the courier who collected the hardware, however, Vox says they are trying to trace it with their stores and have now handed me over to a debt collecting company! I am besides myself and have heard of other clients having the same problem. Their service is shocking.