MTN expired data issue

I bought a 15 gigabyte data bundle from MTN and all of a sudden there was no coverage for more than five weeks. The coverage was only restored on the evening of 23 December 2021 but it did not even last a week then it was down up to this moment of this article. My main issue is by the time it got restored, my data bundle balance was zero as it had already expired. I complained to MTN and all that has been happening is a back and forth email communication of apologies and nobody seems to want to address my data issue. Why does data have to expire anyway? This seems like a ******* that ICASA needs to look at. I called customer care, they then routed me to the coverage department, who also tried routing me to their data department by giving me an *** number that I called and got a response of the number not existent. I am being sent from pillar to post and this is quite frustrating. Such a huge organisation does not have a clear channel for addressing a mere data issue. It is unfair for me as a consumer to buy data and not being able to use it due to the incompetence of a service provider. I now have to suffer because of a service defect that is out of the control of the consumers.