R10.000 deducted from my account

I received a call from card division of Standard Bank to notify me of my accounts trasactions that I previously reported a year ago for amounts that was been debited from my acc which was sorted however the girl that phoned me identified herself as Portia Simelane from card division and had my details with her and no pin number was disclosed to this Portia Simelane and she eventually dropped the call.I was suprised to wake up in the morning to find that there was transaction made from my account 2 & 3 Feb 2016 and all i got the moment i realised money was taken from my account was a internet transaction -Std.bank App.Once-off payment to Ngcobo with *** for R5000-Confirmation OTP: number and another sms notification for R500 and R4500. ***** case reported at Louis trichardt branch and police station on 3.2.2016.Case number was received from the police station and card division ***** Investigator-P Zimbili helped log a ***** case for me with standard bank after i struggled so many times to get through to the correct person to assist. total withdrawn was R10000 and ********* claimed to work for std bank card division.Im a pensioner & that employee took advantage.