triple debited

app**** for a cellphone conract online via telkom website. i was told i need to have funds in my account so that the debit could go off and i will get the phone. debit went off successfully and the came the end of the month i got debited again double the amount. 1st R330 went off my account then month end R860 went off. i called and queried it, telkom agents cannot see the 1st payment(very strange), i was told that they will investigate til date no1 has called me back, no email, no sms, no refund for that matter nothing. i want my R330 back