From your photos, I do not see significant cheek sagging or even significant cheek fat. I would discuss carefully with your trusted doctor before proceeding with any procedure rashly.
I would like to remind you that mesofat injections are disallowed in Singapore currently, so you may wish to consider other options if you really think you have fat cheeks.
There is a Q&A on Human that gives the various options for achieving a slimmer and lifted face appearance. Do check it out!
Regards,
