Mtn south africa has the data promotion they call everyday data which we purchase once a month then mtn south africa gives us 2gb everyday for 30, so my problem is that their internet connection allows stops during 19h00 to 00h00 Everyday

Mtn south africa has the data promotion they call everyday data which we purchase once a month then mtn south africa gives us 2gb everyday for 30, so my problem is that their internet connection allows stops during 19h00 to 00h00 Everyday. During the day it works just fine at the current location but come 19h00. It literally stops working. For me to be connected I need to constantly refresh the network connection (flight mode on then back off). Even now as I text this, after sending I will need to put flight mode on the off so that this message can go through. I loose roughly 1GB every because of this. I tried contacting them through the email but they are not getting back to me.