Telkom offers a switch in plans as needs change but alas Telkom outlets know nothing of this....
In their December statement Telkom offers the following:

Up-date your contract as your needs change - ANYTIME!
Telkom gives you the oppertunity to change your plan as your needs change - even if it's in the middle of your contract! No cancellation fees, no device fees and no changing your contract term. Click here

Unfortunately Telkom stores know nothing of this and are unable to assist as they insist that they will give a new device, they will change the contract term, and they will charge cancellation fees.  Telkom please get your act together,  this is very frustrating. When you advertise, ensure that everyone in your system know what's happening!!! Now will someone at Telkom please call me to sort  out my change!