MTN asking for you PIN to resolve billing

I've received the following response from Goitsemang Segopolo of MTN after reporting that I have been incorrectly billed. To process the request AND FOR SECURITY resons, please confirm thefollowing. ID MTN PIN Adresss Work tel Bank name My cellphone number is not good enough for their system to see that the billimh was not as per my new contract? And I do not think that they worry about bad reviews on this platform.