HDFC Bank — Bank and RM completely unprofessional

I am writing this complaint against my relationship manager - Priyanka from the HDFC Bank. She is absolutely rude and doesn't reply to numerous text messages and calls. I was directed to her by the bank to look into a matter wherein an incorrect transaction involving a huge amount was made on the account. She didn't even had a basic decency and courtesy to atleast acknowledge the matter and provide any kind of support to the customer associated with the bank for more than 10 years. This is damn unprofessional and not acceptable.