Poor service from MTN

I'm very frustrated and disappointed with MTN network. Today on the 20 March 2019 i had a 1.8 GB data on my phone ********** 880. At about 15:00 same day i received a message that my data has been depleted. Because i wanted to send an important wattsup i recharged with a data of 1 GB that cost me R149.00 to send that wattsup message. Around 16:00 i decided to check my data balance hoping that my 1.8 GB will be returned. I got shock of my life, now i was left with 550 MB data out of 1 GB that was recharged plus 1.8 GB that was lost.

I phoned MTN to raise my issue but they took me from pillar to post. Another lady advised me to call their technical department to find out what is happening. Later the call was returned back without any one from technical department assisting me. I phoned several times but they took me from pillar to post, another lady advised me to send a letter of complain to MTN and it will take them 24 hours to 72 hours for the matter to be resolved. I just gave up and my phone was also running out of battery after battling with MTN for more than an hour to resolve my issue. My phone went off from 17:00pm until 21:30 when i managed to charge the battery.

After i switch on my phone i checked again my data balance. Again only to find out that i'm left with 250 MB of data but my phone was off. Again i phone MTN call center at round 21:30 pm to relate my frustration but still they failed to assist me. They told me that maybe the problem might be applications that are running on my phone . Not sure what applications they talking about because i only use wattsup . Why those applications decided to run today because normally it take me a month to finish 1.8 GB of data. The lady who was assisting me told me that on their system is shows that my data was used on internet. I hardly use internet on my phone because i do have access to my work internet. The lady advised me to write a letter of complain to MTN but it will take them 24hours to 72 hours to be resolved. I'm really frustrated because how can someone loose so much data in one day only using wattsup. Again MTN failed to resolved my issue after calling them several time to resolve my issue.