Telkom Mall of the South- Upgrade Problem

I went to Telkom Direct, Mall of the South in the Friday and after doing an upgrade on the Business account I took the phone to my MD. He said the handset was too small and I must change it, I upgraded to the S25FE and he said he prefers the S25. When I phoned the store on the Monday they said once you have seen the phone you cannot change it even if you have not used it. I went there the Wednesday, and they told me the rules do not apply to them as it does with online stores where you can change your mind within 7 days. I still have no luck regarding my complaint which I have sent to various Telkom email addresses.