Consultant failed to cancel the contractin time

I called the customer service in January to cancel the contract that was ending on the 16th of February 2020 the consultant told me that the last debit my account will be on the 1st of March 2020. During the month of February I called again just to verify if the contract was cancelled, then they assured me that yes, it is cancelled on the system.Then to my surprise this morning(18 March 2020) I receive the statement that is showing the next debit order will be on the 1st of April then immediately I called their customer service to find out how come the contract wasn't cancelled. Then the consultant told me that they running a statement a one month behind. He told me that the last debit order will be now on the 1st of April2020. Then I asked him that what you are saying to me today(the running of the statement a month behind) is not what they told me initially. The he apologised.

Then after two hours of calling them, another consultant called me(The one I spoke to in January) and asking me that was I serious about cancelling the contract? Then to me it sounded like the lady did not do her job (cancelling my contract).

Now because of her not doing her job, I must pay for the contract that ended two months ago?

Please help me!