Malaysia Airlines — service issue

I have been trying to call the customer service agents since past 1 hour to reschedule my flight... It takes a very long time for the agent to get on the phone and when my call finally gets answered, they are just not bothered! The hear the issue, keep me on hold for sometime and then disconnect my call... This is extremely unprofessional on the part of the telecallers / agents
I cant manage my booking online as i had checked in and i got a notification stating that i need to call customer care.

My confirmation - vkanyd