pathetic service and misleading customers

My name is Trevor Sambo, I got a message from MTN requesting me to swap my sim card to LTE sim card and I will receive 1 gig free within 24 hours, I had to follow instructions and do it manually and no T and C's were presented, I called MTN customer care several times as I did not receive the 1 gig from the 23rd March until today the 7th April, despite my effort of calling them and requesting team leaders, nobody bothered to give me feedback and was mislead by different agents that were not informed and kept telling me of 24 from the 23rd till today, to my surprise today around 16:00 the 1 gig was loaded that I have to use for 2 days, I mean real now 2 days? I wouldn't have wasted my time go and purchase LTE sim and write every piece of information saved on my sim card on a piece of paper because u loose the information when you swap, for a gig that will last 2 days and the follow ups, I am requesting MTN to extend my expire date to 30 days for the inconvenience and to give me feedback on my request for all the promises they team leaders did not keep, MTN doesn't care, I will also take it up with CPA and ICASA because I believe I am not the only customer mislead everyday