What charges can you dispute on debit card?

Here are some common situations where a transaction can be disputed:

You canceled a service and you're still being charged for it.
You made a purchase, but the amount on your statement is wrong or you were charged twice.
Service or merchandise was not as described.

Can the bank reverse a debit card transaction?

The term payment reversal applies to any transaction when payment funds are returned to a cardholder's bank. A payment reversal can be initiated by the cardholder, merchant, issuing bank, acquiring bank, or card network. There are lots of reasons why a payment reversal may take place.