Mtn Night express Ripoff!

At 12:00 am today i bought 1 gig night express data. I watched a few of my favourite soap and then the webpage stopped working and said out of airtime. I checked my balance many times and saw my data was still there, so i rebooted my phone. I bought 1 gig data again and the internet worked for 4 mins then stopped again. I could not get in contact with mtn Support as the number just rang. After an hr i dialled 173, option for ****** phone then was put through to an mtn champion. He said its just a network problem and he would refresh my acc. I was told to switch my my phone off and try again after 10 mins. It didnt work. I even tried the sim on my tablet. This morning i called again to complain and the champion i spoke to this time said she doesnt know and i had used my data up. I asked her to check and was told i have to wait 24 hrs for my acc info to reflect on the mtn system. Wat **** just this morning the other guy had seen my recharges and bundle purchases. The woman knew bothing and could not assist me so hence my complaint here. Mtn sucks! I am only on mtn for under a week, im going back to cellc. I want all my airtime back. Why should i pay for ur inferior network system.