Poor/non-existing customer service

I have attempted to cancel some of my contracts due to them reaching expiration date, I had to call numerous times to confirm if it has been done, I called the first time on 19/01/2021 to can contracts that ended at the end of January 2021, and one that ends on 11th February 2021, after the city call only one of the contracts has been cancelled and that was only by the 8th February 2021 I was informed that I would pay for the contracts till the end of February although I attempted to cancel them before they expired, this is unacceptable that I have to pay for something which I cancelled but due to someone not doing their work correctly it was not cancelled and the process has not even been started with