Billing Of Account & Bad Attitude

On the 21st August 2015 my account was debited twice (R205.21 & R250.00) by Cell C. This morning (24th August 2015) I called the call centre 084 140 to enquire about my account debited twice, I spoke to Chantel Shabangu to check on her side as i have two accounts or ccontracts with them *** & ***) she advised that on her side only reflects the R205.21 and the other debit order will be on the 26th August the last time I checked i make an EFT payment for the *** number. I asked her if she can assist me in another way to check how come i was debited twice with a very bad attitude and no manners at all she gave me she didnt give any alternative as a service provider i dont understand why cant they assist customers...