Unauthorised deductions

Had a shocking experience with Nedbank I have lost R600 to nedbank in January and a further R1600 today without explanation even when i call them. Service has gone from bad to terrible especially with the call centre agents.. Before i lose more than i have considering i am unemployed, i have taken the matter up with my legal adviser and it seems I am not the only customer experiencing loss of money in my account without notification. When these amounts are deducted i don't get an sms but other transaction the sms notifications work just fine.