BAD service and problem still not resolved I have being a loyal customer for many years but might need to change that in future

Good day, I am back again with the same complaint, but it seems that I might need to take this further. I have been a loyal client for 36 year what does this mean.. my first number which I have received when I was in primary school is still my existing number. I have never moved away from this brand but I have my thought on this now as loyalty does not matter any more. I have upgraded in October our data package from a 200G to 1TB + ZTE MC801A1 R699 per month for 36 month because we run out of data then I cannot work fom home. The consultant confirmed that the new data will be loaded from the 1st of November but it did not and then a gentleman from the complaints department explain that it will be loaded from the 1 of Dec but it is still not correct and loaded. I the Device but the data is not loaded. Please dont tell me that the system cannot be overrided as I believe humans can interact as we load the information or instructions. Please correct this or I might look in taking it further because that is what it is about treating customers fairly..... please when phoning give me the solution and confirmation that this is correct....