Account Billing

<p>I recently took out a contract with vodacom on the 07/03/2017 ,my agreement with them was the debit order will go off on the lats date of the month ,my debit order didnt go off on the 31/03/2017 as agreed , i contacted vodacoms customer care to find out the reason for the debit order not running i was told that my debit order was done on the 28/03/2017 wich was returned due to insufient funds , i then asked how much was my intallment ,i was given a rediculous amount wich was more than my agreed instalment ,i asked the consulted why was the amount so high she told me she didnt know and that she was gonna tranfer me toount ,from accounts i was transferd to billing then back to account and back to costomer care im still unhappy because im still not sure why im being billed so much and the reason for my debit order date changed ,no one can help me with this ,the services im getting from them is a total ****</p>