Wifi and billing

I called last week to cancel my Wi-Fi at the old address as we were moving to a different location. To date the Wi-Fi is still on at the old address when this should have been cancelled and iv been charged for the service today. We relocated and added a new box at current location which is active. As per my call with the lady she said i will not be charged for the new month at the old residence only for the current residence. Why was I charged? Please sort this out as im not happy at all

Details are under my husband name