I requested a cancelation months ago

I called Mweb last month asking them to cancel my application for LTE.

Last week I sent an email because I received an invoice of data I have never even used, and I was assured this will be handled. Now today again a get a statement of how much I owe them

Can someone please tell me why my request hasn't been actioned. I don't want an Mweb LTE I canceled it.

Now my credit is going to negatively impacted because someone didn't di their job.

I need this sorted out TODAY