Bad, MTN, bad!

Apparently it's not necessary to have your data recharged immediately after buying it, I mean, we buy data because we only want to use it tomorrow! I have a data contract with MTN and I use a lot of data due to teaching online. This morning was a nightmare, called MTN TWICE as my data recharge did not load, it's now 13h48 and my data is still not loaded. Support told me it's a 'back-office issue' and they have a 24 hour response time. Really?? Fortunately I have a back-up router otherwise I would have lost my students, not to mention quite a bit of money. Considering the nature of your business MTN, is this acceptable to you??