Telkom Contract disclaimer.

Telkom recently had a special on Free me contract for a Samsung A32 contract online, I went online and signed up for the contract, that was on 27 November 2021 at 08:00, within an hour an agent from Telkom telephoned me to say that my application was successful and should expect delivery of my phone within 7 days, after 5 days I tried calling Telkom mobile about my new phone and contract and they have told me that no such offering exists and I have never made such an application, what about Telkom disclaimer when you sign up for or a new contract or when they phone you, is a telephonic contract not valid anymore, or does it only suite them.