Rain Mobile Non Existing Customer Service

I have enquired about this very much massive bill given for data usage in unlimited off peak time. It's been over a week and with numerous follow up emails I have still had no written feedback from Rain Customer Service/ or whoever is in charge of accounts.

They dont seem to bothered and seem like they will just be deducting a R10 000 data usage bill from my account and most likely only after that provide feedback on my query.