Disappointed customer

I am in absolute disbelief that such a established company can act so inhuman towards their customers I cancelled my contract in October 2022 and to date they are billing me not justifying why.. They just feel like they can continue billing customers who had already cancelled..it is inhuman and ********* after being a customer for many years not failing to pay my contract not one month...this is the thanks I get We are living in extremely tough times and honestly don't need this unnecessary issues that make no sense I want this resolved and I demand my money back which is fairly owed to me!