Data bundle enquiry

I loaded mtn Monthly 1g via the Capetic banking app on the 22 November 2023 I have not been able to use it since then I called the call center yesterday and spoke to an agent called Tirhani and explained my story to she told to switch off my phone for 15mins I should able to use the data .I did that it's still not working and to my surprise when I checked my balance it shows the data that I brought is expiring on the 1st of December 2023 .When I called again today the agent decided to mute the call when I asked her to repeat her name and she dropped the call .All i need is help to get this 1g working or I need to be refund me and they need to be transparent in what is being sold to us as consumers.