State Bank Of India [SBI] — Unethical behaviour of SBI employees

Address:

Bawana, Narela bawana road,110039

Today my mom went for withdrawing 1000 rs from her account. My mother was humiliated by bank staffs and specially teller. The teller said sexual and unethical comment on my mom.
They didn't give our money, unwanted issues like it is your child account.
She was patiently responding them but they were teasing her. They do this specially to the slum people like we are not costumers. They said that they don't care about complains.
Is it digital India ? Is it the right way to talk with females?
Please sbi do something otherwise I need to take harsh steps.