Cancellation of Telkom LTE Contract - Telkom ignored my instruction

I have cancelled my telkom mobile LTE contract as I've relocated and there is no signal in my new home. I have gone into a store to be told that you have to cancel online. I cancelled online at the beginning of January and have just received a normal monthly invoice for the end of February. Seriously Telkom, your service is ****!

I will be stopping m debit order at my bank which will force your accounts people to call me to sort out the payment.