MTN *****ing data

I pay R300 on my sim only contract and I get 120gigs of data where half is for daytime and the other half for night express, last month my 60 gigs for daytime finished in two weeks and I called mtn to ask why and I was given a reference number and till today there’s no feedback then on 17th of December my data came in like it usually does and you sent an sms stated I got credited with 120 gigs where in reality you put 60 gigs where the half is for daytime and the other half night express. Till today feedback