Just for fun next time, try the following lines.
You: Hello and good afternoon. Is this <insert shop name>.
Sales Rep: Ya. What you want ah?
You: Splendid. My name is Ah Too and I'm calling on behalf of my boss, Tun/Tan Si/Datuk <insert someone's name> to ask if you have a particular watch in stock.
Sales Rep: Oooohh.. , yes yes yes.. what watch you want?? (followed by some panting noises)
....
Actually, when I was hunting for a local AP 15300 in stainless steel, I called all ADs listed in the AP website. While the SA weren't really helpful, they were not rude. They did tell me they didn't have any in stock and don't expect any more but quickly told me that they have the gold models and some Millenary and Jules Audemars models and asked me to drop in to look.
The best by far was an AD in Penang where I spoke to a very nice male SA. His tone wasn't very good in the first 1 or 2 minutes but it quickly changed after he found out I was interested in an Audemars Piguet.