My experience with realtors in the Philippines is that most are not bothered to reply to emails. But you will get a reply from this one https://philippine-islandproperties.com (connected to the owner of this site*) and from Jake Lacson - jtlacson97@gmail.com.

I am not disparaging any other Realtor locally as I don't know them all - but getting one reply is a struggle and getting a follow up if you make further enquiries is extremely difficult. If you want to sell then you need a Realtor who will make the effort for you (selling can be a long process). This site also takes Classifieds for property.

* Clarification: I used "connected to" as I am not aware how ownership of the Realtor business and other businesses (including this site) are structured or related.

 

I agree, Jake (Lacson) is one of very few professional realtors in the market here, he helped us find our first rental in the area.
Many many would-be "agents" operate here, who are just interested in making a quick buck. Al they do is try to locate a house that's for sale (many through facebook "marketplace") and then find out who owns it through whatever means.
That leads to the same house being offered through a whole bunch of different agents (who were presumably never hired by the owner). Most of these agents know nothing about houses or market; they're only after a commission.

 

I think I might have been correct (note: I am avoiding saying you are not ) as this is the name of that website 'PhilX' and the email they give is shirley-website@philx.ph.

There is a similar named site https://islandsproperties.com (I think the one you used 11 years ago but different from https://philippine-islandproperties.com) but I stick to my two recommendations for Realtors I know of and am impressed by.