Scammers are spoofing bank phone numbers to rob victims
It can be a very convincing trick… “You can check the number in your display online sir. You’ll see I’m really calling from your bank.” That is, of course, if you are unaware that phone numbers can be spoofed. Then again, they wouldn’t be successful scammers if they weren’t convincing. If you suggest calling them…

Yes I just received the call by the same number saying I've spent 2K in KLIA. I tried blocking the number but from 0325587766, they use 006032558766, 000060325587766. They kept calling.
Received call from this number today. Mandarin speaking guy.
Same story as others, UOB credit card purchase at Nikon camera store in KLIA2, card applied in JB, card applied since January 2016, balance of RM6K++
Able to call my full name and NRIC. He hung up after I told him I will call UOB office personally.