Just another VM user trying to help, so no guarantees that my advice will work . If my suggestion is helpful, please mark it as helpful; it may help others. Just want to say "Thanks"? That's the Kudos button.
I've now been able to locate your account and have checked the model of set top box that you have, and I can confirm that this model is no longer required to be returned, so you may take this along to your local recycling centre to dispose of.
I've also noted the account to say that I've advised this so there is no come back on you.