The best idea PR guys from PayU might have:
Dear Sir or Madam,
We would like to apologize for the INCORRECT INFORMATION in our last communication.
During the break which will take place on 27 November 2014 from 05:00 am to 05:30 am you could not be able to log in into the system but all transactions WILL BE SETTLED. A message informing about unavailability of the service may be displayed during login attempt.
We are very sorry for the inconvenience and misrepresentation.
The funny thing is that I haven't got any e-mail on the technical break in the first place.