Your contract never actually just ‘ends’, although it is a common misunderstanding. What happens is that you come to the end of the (usually) 18 month minimum period, the contract doesn’t cease but instead changes to a rolling monthly one, generally at a far higher price as any ‘new user’ discounts will stop.
Either way VM require 30 days notice to terminate, so in your case it looks as if the minimum term ended on 20th September but you only contacted them to cancel around 1st. Assuming that VM acted on the cancellation instructions on 1st, but let’s be reasonable and say 3rd to allow time for the letter to get there and be signed for (you did send it by recorded, singed for delivery; no) - then the cancellation should take effect as of, say, 3rd October (30 days).
Now VM bill in advance and until the cancellation date arrives they work on the basis that you might, well might change your mind and stay with them. So, yes, you will get a bill for the whole of October, and they will take the money, but will/should refund it if the cancellation does, indeed happen on 3rd.
And ‘goslow’ has helpfully provided links as to how to return or dispose of VM’s equipment.
