I'll give tips on using asus service from my experience. I've not used it in malaysia though.

1) try to use the service from ASUS website. This is typically the best way.

2) if an option you need isnt available on the website, google to get their inside contacts and email them. Dont expect same/next day reply but rather a week. Once contacted, make sure to explain that a particular service (i.e. warranty for something) isnt available on asus website, describe the issue and provide the details (like serial) and any images if relevant (i.e. damages)

3) Once the service is ordered, make sure to get an address to mail it to. Make sure that the address isnt a random private address but rather a business/factory one.

4) Mail your item (typically you will have to do this yourself as this isnt amazon) and take note, make sure to use a signed service at least (tracking is better). If required, make sure a return is also covered by either party negotiated beforehand.

This is how you use asus warranty service, for customer service, use website/phone . This will skip all the shady stuff and red tape as like with many branches in malaysia arent owned by the company rather by some other guy who puts the company logo at his shop (just like telco 3rd party reseller). Despite this being a low yat site, i still dont recommend going to low yat for anything, be it repairs, service, shopping mainly because of the shady nature of many shops and staff.

they service other businesses, typically those businesses are people they know and a lot of hardware they use are old. I've walked around low yat years before when it was less shady going around the shady areas, the hardwares around there were ancient at that time which they were repairing. So they do have revenue.

They also get business by overpricing perhaps to some sucker who doesnt know a thing.

Also if asus website is bad, just look for the service manager contact. If the asian contact is unreliable try one thats in taiwan or any major place thats decent.