Ref ***3 Never Resolved

I received an invoice on 6 September for additional mobile data usage fees for R1228.44 on my telkom bill which I do not understand. I have made 2 queries regarding this and no one has ever gotten back to me regarding the resolution of this. The line in question is an emergency line that has a 2 gig cap on it, so I am not understanding how the additional data was used as the line is capped firstly, and secondly no one uses this line except myself in emergencies, which I monitor strictly. Telkom needs to give me a full breakdown and explain this to me. If it is indeed my fault I will gladly pay, however, to the best of my knowledge I have not used this data. I have a ADSL line that I pay to top up all my data on whenever I run out. Historically you can see my account and how I use data, so why would i pay mobile data premium rates for an emergency line I hardly use anymore. The only communication I have ever received from Telkom was someone calling me to tell me I needed to contact the mobile data centre. I have tried to make contact numerous times with no success and have made an online query that all it says was REJECTED but with NO EXPLANATION. I am entitled to and explanation as well as a proper resolve on this and not have to simply be expected to pay additional fees without this being explained and resolved correctly. Please someone get back to me and explain!