Limits not adhered to

I have 5 cellc contracts. My daughter uses 1 and ran up bills in excess of R3k each month for 3 months while on a R500 limit. Cellc allege that the the limit was R15k. This R15k was set for 1 number which my wife uses, the purpose being to allow international roaming while she was overseas. Cellc app**** this across all the contracts incorrectly.<br> I accept my daughter made the calls and used the data. But had Cell C admin not incorrectly terminated her contract limit of R500, we could have prepaid for data at approx R150/gig. I ask a credit JUST FOR THIS DIFFERENCE between there over bundle rate and the prepaid rate.<br> Despite 6 emails to customer service and what they call TPHD, no joy