Stores refuse to provide advertised contract

The Telkom website clearly states that the SmartInternet 5GB (sim-only) package is available on a month-to-month contract, however the stores at Cape Gate stores and the call centre refuse to provide this product without a 24-month contract. I have wasted hours of time standing in queues and on the phone and everyone I talk to just says it's not their fault and they can't help. It is completely unacceptable (not to mention *******) to advertise products that do not exist and I would like some answers from someone at Telkom.