There are many ways to find competent programmers who can fix the various coding issues which lead to memory leaks and crashes. You can use "Want Ads"; you can use radio, television, and internet advertising. You can post help-wanted ads here in your forum. You can use Facebook and Linkedin. I would advise against Craigslist, though, as that must be where you found the programmers who put this game together (it hasn't worked out so well, has it?).
If you need any more suggestions, hit me up and I'll offer you some advice. Note, however, that competent programmers can command a salary commensurate with their skills.
The only substitute for victory is overkill.