this background should worth some decent offer.....and thus I will sugggest in case you really dont have not to rush for one, and wait till next year in order to have better planning......
找了中介就是最大问题...indeed should say......care too less about the planning after finding agent is the major problem.
with a few year of working experience, but not a really competitive GPA, the best strategy is not to compete with fresh gradaute for economics / pre-experience finance master, but rather to try some post-experience master in fiannce program (in which you can leverage much more of your related working experience), or trying a MFE type stuffs by leveraing your actuarial background and FRM.
example for post-experieence master in fiancen: Judge Master in Finance, or LBS. I also think of the one in Amsterdam (the post but not the per one).
good luck on your MFE application for SG. I guess you stand a bigger chances relatvily than pure MSF.