I cancelled my contract on 13th April, giving the necessary 30 days notice (as I was out of the minimum contract period). Having to do this on the phone is very unsatisfactory as it provides no evidence, but fortunately VM emailed me with a 'hope everything goes well with your move'. Not only that, they sent me the packaging to return the box and modem, so I returned it when I moved out of the property and have had an acknowledgement from VM that they have received the equipment from me.
So I was expecting a final bill up to 13th May....
Well, blow me down if I didn't just get a bill for a full month from 9th May to 8th June at the full monthly rate!!!
If VM take a full month's payment 'on or after 28th May', I will be very upset, and VM should expect me to claim a refund plus my costs.
My case does not seem to be an isolated one, and it seems to me that it might be VM policy to extract as much money as possible from people who are leaving. If this is so, it is a very shortsighted policy, as it only results in alienating customers who might otherwise have returned to VM at a later date.
Turns out that the billing system does work after all.
I have now received a new bill covering the final period, and giving a credit against the previous bill, so that VM will only take payment for the final period instead of for the whole month, and a refund cheque will not be required.