Deductions from credit without permission and disgustingly poor service

Incorrectly paid my telkom Mobile account instead of my adsl account.

Called them. I was told the money could just be transferred to my adsl account.

Waited, was told later when I queried for the third time it could not be done but they would try again and inform me.

Days went by with my credit still in their account.

A manager contacted me via phone and email and told me he would have it actioned.

Apparently the manager went on sick leave and until today when I got my statements I see that they decided to deduct the monies for end June early (from my credit amount which was supposed to be for my adsl account) and can now only credit me with part of my money.

This now sends my adsl account into an unpaid status and at risk of being switched off and my money being taken early without my consent!!!

How is this fair and who will pay the balance of my adsl account now?

Telkom is ridiculously shady