Union Bank Of India — Delay of 2 days before PIN generation

Hi,
This is more for other users. When Union Bank ATM Card expires, a few days before expiry, the bank sends you a new card.
The thing is is the previous card is expiring on let's say 20-January and you receive the new card on 18-Jan

Then the new card can only be activated 2 days after the end of previous card.

I received my card a day before and I tried to change the PIN by going to Union Bank ATM as well as online banking but in all the cases it was saying Invalid Card.
Calling customer care was useless and they had no knowledge o[censored]nderlying process. They fooled me by saying if one method is not working try another like WA banking and so on.

After 2 days the PIN generation automatically worked.
Union Bank customer care is incompetent.