My cancellation letter please

I called easypay insurance on the 1st of October to ask them to cancel my policy then I just took my number and said they will get back to me before the end of the day or the following day,which they didn't do.On the 2nd of October I called them again then a guy by the name of Sidney said he will help me to cancel my policy then I asked him to send me a policy schedule and a cancellation letter but he just send a cancellation letter only and his asking for the cancellation letter from his department then he will call to check if I got it and he said I will get it they the end of the day or the following day which I didn't.then on the 4th I called again to ask for the cancellation letter then they tell me they are not giving out the cancellation letters their system just send out a cancellation sms which I didn't get.