Simply log onto your my-rain dashboard on the rain website (www.rain.co.za) and cancel your SIM.

Select the service you wish to cancel by clicking on "Manage"

Scroll down to the bottom and select "Cancel SIM".

The cancellation will take place on the last calendar day of the month, you will be billed the full amount according to your service plan and the amount will be billed and payment collected at the end of the month.