Incorrect Information and need cancellation email

I called the CC on the 10th of May 2019, requesting to cancel my car insurance and I spoke to a lady by the name Nozi/Nosi to cancel and she told me that she was going to send me an email to confirm the cancellation after speaking to her. I have been waiting for the email since Friday and still haven't received it. I called again today and spoke to Nosi and she told me a different story saying that the manager from the cancellation department will cancel my insurance, how can I believe what she is saying today when she told me a different story on Friday and why does it take so long for Liberty to cancel the policies.

And lastly I expect not to be debited at the end of the month as I have cancelled in time and if could received my cancellation email before the end of today.

Nosi should also learn to be polite and give correct information.