VOX CHARGING FOR ROUTERS THEY FAILED TO COLLECT

Vox is trying to charge me for their router that they failed to collect after cancellation. I asked them to contact me for collection and they did not. 8 months later the billed my account which when i phoned them they said it was failure of collection which i said no one ever came to collect it. They told me the people had phoned and i stated no and asked for proof which they failed to send me. They then only phone after a week and ended the call on me twice and stated they couldn't get hold of me even after i responded to an email saying that they ended the call on me! They are trying to **** me. A lady phones me today and asks me to pay or use my fuel or my money to return it myself which is their way of getting out of their services as the previous lady told me they actually had a problem with the courier thy were using last year and thats why it was never collected. Im constantly being hung up on and treated so badly. I've never in my life dealt with such horrible staff members. Its actually disgusting!! NEVER EVER USE THEM!!!!They are trying to bill me R2000. Their router is still in my possession, they must just fetch it and cancel that balance because I did not refuse to give them their device. I am not the only previous customer that they are doing this too and I have all records of this. It is not my job to drop off a router they never collected and now actually almost a year later have decided to wake up and try bill me! Ridiculous.