Security Risk

I had a vehicle finance with Standardbank , the car got written off on the 23rd June 2017. I called the bank to notify them and spoke to a lady Sharmitha.Smith on the 31 July 2017 as they debit the instalment for the car after insurance had settled the outstanding amount. Sharmitha asked me to scan her a copy of my ID and bank statement that I did. I have emailed her several times and tried calling no answer. I have still not received the refund back or any response from Sharmitha and for the main fact that she has a copy of my personal details I am not to happy about that and i refuse to send my details again to some else.