Can an agent do all the legwork for getting married?

[giddyup]

Long story short, I went through all the steps of getting married a few years ago with my partner of 15 years, like going to the Aussie embassy, getting translations done etc, but found out before I took the last step of getting married in a Amphur office that being married would impact my Aussie pension, so cancelled it. Now I'm 82 not too bothered what Centrelink might find out, so rather than go through all the same steps wondering what an agent can do to save me running around?