From the article:

This is why a recent prank call by radio station Fly FM was upsetting. It was both insulting and in bad taste. The radio station should apologise for it.

In the call, a woman doctor was called by someone "in charge of transfers." She was informed that she would be transferred to Sarawak and that the tribe chief of the place she will be going to is on the other line waiting to speak to her. She didn’t want to go to Sarawak, so this was a big problem for her.

They connected her to the “tribe chief”, whose name doesn’t sound at all Sarawakian by any measure. The purported “chief”, sounding decidedly Indonesian, asked her to come and help his people, but she declines and in the end pretended to be mentally ill at the officer’s whispered urgings to avoid going.

And the “chief” believes her and asks for another doctor to be assigned to his tribe. The call, since uploaded to their website as a podcast, can be listened to here.

So, you have:

Fly FM, being pieces of shit with their… what was it called again? Krappi calls?

They relentlessly use stereotypes of Sarawakians

The woman they prank has these horrible beliefs about what Sarawakians are, and gets to broadcast them to national radio.

She then pretends to be mentally ill. Please note, she’s a doctor.

And this is supposed to be funny.