MTN HAS BLOCKED MY ACCOUNT AFTER *****ING MY DATA

In April MTN put ridiculous data charges of over R3000 on my account which I IMMEDIATELY contested and they kept closing the call saying that it was legitimate data charges. tHIS HAPPENED DURING THEIR STRIKE, They have since HARDLOCKED my phone and I am at my wits end. Loosing business all the time. I have been their customer for 16 years!!!!<br> <br> <br> I have asked them over and over to send me the so called urls I visited that incurred these charges. I am really contesting the data being loaded onto my phone. I have screenshots on my device to PROVE what I have used with MTN since they took over our accounts. My TOTAL usage since 23 October 2014 was recorded. in 8 months I had used 25gigs MTN provided 300mb per month of this. I topped up by buy DATA BUNDLES and never went out of bundle.<br> <br> My phone usage behaviour on my phone NEVER changed and on the days of the biggest problem I was not even on my phone, I was in class. They are ignoring me, I am receiving no feedback (they can't phone me because they blocked my friggin phone!!!!)<br> <br> I really don't know what to do anymore and I cannot spend another day sitting in front of yet another person trying to resolve this!!