Useless after sales service

I am honestly so disappointed in the fact that I need to get onto these platforms because my queries are just not being resolved by following the internal routes. Everytime you send an email to customer care a different person replies, how is this sufficient? My query was escalated first via a phone call which nothing came from, then I went to the store and basically they told me they cannot do anything, then I sent an email and still nothing solved.

I received monthly calls to urge me to upgrade basically and when I eventually decided to upgrade after 4 years of having my contract, I am already experiencing difficulties in getting what MtN promises. There was a promotion ran in January to receive additional minutes and data for three years but these services were not loaded on my contract for Feb nor March. How is this so difficult to get right?