Keeping clients hostage

When I cancelled my contracts, I had three, they pretended that they cancelled all of them but only cancelled one. And now they refuse to adress my query or give me feedback. They even put me on a loop to not take my calls on the customer care line. At the end of the day I am held captive to keep paying for their mistake, I did cancel all the contracts, they did not implement it. They bully their clients because of their incompetence. They feel like they hold all the cards, I now have to pay for a service I cancelled while they drag their feet to give me feedback on my query. And once its found that I am correct how long will it take them to refund me?