incorrect billing cant be resolved by service provider

<p>I recently received my upcoming monthly invoice to my surprise there is a double billing for November and December for the contract which is due in January which I understand but now the insurance billing is incorrect amount an after launching a complain with the service provider I get feedback like "you should pay it an if there is a problem will refund you??? for now case is escalated to the store an you should visit it to make correction" . while I explained how I called the insurer and everything is ok the problem is with the billing, I was told the is nothing I they can do I have to visit the store. moments later I receive this sms "Your case no ********** 6 @ Telkom Mobile is resolved.Please call 081180 for further "</p>