Overcharging account for double subscriptions

I have phoned in regards to overcharging of my account. We have relocated to a new home and I have requested a transfer of address and subscription. We have moved and received the fibre in the new address however, I am still being charged for the old address' subscription for a few months now in addition to the new address and subscription.

I have repeatedly phoned. Received a case number and multiple promises but no resolution to the problem has been provided.

No one seems to care. Pathetic.