Review of Locus Property Services

This is the first time I rent a house in Singapore.
I found the unit, I contacted the agent, I shared my budget n expectation, I got the reply on the very same day.
We met next day, I viewed the unit n presented my cheque as per requirement.
The surprise is, in next hour, I got the call from the agent that someone offer better price n she has to go for the other customer n drop mine! I m sock....

I really look forward to some explanation which I found that the behavior n approach are totally unprofessional at all...

Rgds
David