anything I could do if waitlisted by Kellett

millions of thanks in advance if anyone could kindly share some tips, here goes our situation:
My 4-year old boy just finished interview with Kellett Kowloon Bay, Reception year by the end of last month. Kellett admission office emailed us last week, saying that the feedback from the interview was positive, and the school would be happy to accept the boy once an opening arises. There will be continuous movement of the waitlist and we shall be informed if the school is able to offer the boy a place.

My son moved to Hong Kong half year ago, so we did submit the application quite late, ie, September 2020. Hence it was not a big surprise that he got waitlisted. My question is, shall we do anything to 'impress' the admission office in order to move him to a more advantageous place in the waitlist?

I consulted a few friends who had children in international schools, though not necessarily Kellett. Some said 'no, you shouldn't bother the admission office at all, just wait quietly'; yet some said 'yes, you should email the office once a month to kiss the ass' ... some even suggested 'once a week' which seems to me quite exaggerating :(

Sincerely appreciate if anyone could share some tips, we desperately need some guidance/suggestions, thank you all!