Telkom Mo nice, no nice! Expiry date of data bundle not as per what is advertised

I use the Telkom Mo nice data deals and I just now purchased 900mb for R 14.00 for seven days. I have loaded it just now today on the 21/07/2019, but it tells me the expiry is for two days and will expire on the 23/07/2019. I feel this is a total **** to advertise that 900mb for seven days when it actually expires in two days. We want to save money and need to know how many days it will last, this is just making this more expensive. This is the first time i am having an issue with Telkom Mo nice data bundles. What is the issue here? Will I get data for the seven days I have been promised?