MTN PLAYING WITH MY DATA AND I AM LOSING VALUABLE CUSTOMERS WITHOUT DATA

On Monday the 4th of March at 11:38 I purchased a mnt data 7.5G using my FNB banking app, I received an sms from Mtn saying that my recharge was successful, I also logged into my Mtn app it was there listed as a data bought with date and time of purchase, on my fnb banking app it also showed up, but unfortunately it has still not loaded on phone, I have called mtn several times, made to hold for hours and in the end I was told that they can't help me, instead I must go to my nearest mtn shop which is about 150 kilometers away