Cellphone banking ****

Hello Peter . I recently received an SMS notification of an amount of R1700 being transferred without my knowledge. The amount was being sent to an unknown number. When I log into my capitec banking app I noticed several amounts being withdrawn and noticed that SMS notifications had not been coming through. I went to a capitec bank and notified them . They saw several R1700s which amount to about R8000 reflected in my account that had been continuously withdrawn using the *120*3279#. They could also see who the money went to but I do not know the person. I haven't received much assistance from them regarding investigating further except being told to stop utilising the cellphone banking using *120*3279#. Please kindly assist.