Duplicated payment

I was billed twice for one of my cell c lines in the month of June. <br> <br> I have sent cell c two emails already and still did not get a response<br> <br> I spoke to two consultants already who were not helpful in this regard. <br> <br> I am fed up with Cell C and I need them to reverse the transaction or terminate all my lines with them as this is not the service I will be paying thousands of rands on