Unresolved billing enquiry

I'm not sure what Telkom call centre agents are employed to do. It's been 4 months and Telkom can't tell me why my monthly payment went from R399 to R899. I don't remember signing up for any data usage. I asked them to provide me with the logs on what the data was spent on during the month of May, June and July. Their consultants are just clueless and useless as the people operating from their stores. How can you resolve billing issues via call centres? This is money we're talking about! The first thing their store employees throw at you is their bad attitude and telling you how much they don't deal with billing. Telkom service REALLY sucks. If this isn't resolved by next week, I'm reporting this to ICASA. Now they have suspended my account but they fail to give me data usage logs! I'm SO SICK of your disgusting service!!!