The consequences of using abusive words against a customer

I am in the sales department of a bank in the UAE,

I have used abusive words towards a customer. Can the bank file a legal or criminal case against me if I was found guilty?

This incident has occurred since 20 days. What happens if the customer complained to the police?

Is there any particular time period for registering a complaint? How long it takes for the police to take any action?

Please help!