Extremely bad customer service

Quality of service is all about how you manage your customer when there is an issue. I have been flat out ignored by SADV for 2 weeks, who charged me a cancellation fee and my normal monthly fee for fibre in the same debit, despite having given notice of cancellation well in advance. I have no issue paying a cancellation fee, which I believe is in the terms and conditions when you sign up. But why would you charge me a cancellation fee and a fee for another month of service at the same time, when I've clearly stated the end service date well in advance.

I've followed up on email multiple times, with no response. I've sat on the phone multiple times, only to be cut off before reaching an accounts person.

I wonder how much money you've wrongly taken from people who have followed cancellation procedures diligently, and still been *****ed over.