Billing Cycle

I have now connected a fibre line to my house and hence needed to discontinue my Telkom line and service at home. I filled in an online application to discontinue the service on the 24 July 2021. As per their conditions 30 day notice must be given. The notice was accepted and I received a SMS with a reference number. This brings me to the point of this review. Here is a copy of the SMS

Dear Valued Customer, Herewith is your reference number related to order of: (***) Backdated from : 2021/07/24 to 2021/08/30 ***. Upon receipt of your request, I can confirm that the cancellation will complete on the 2021/08/30 and you will be billed up until the end of your billing cycle 13/09/2021. Kind Regards TelkomSA

My point here is I am going to be billed for 51 days. This policy of billing cycle is a *******. What if they make a policy saying their billing cycle ends say at the end of their financial year. We have to pay until then? Telkom is ripping people off.