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You can sue the defendant in KY small claims court (even though the defendant lives in GA, the transaction occurred in KY, so the KY court can exercise jurisdiction).
You can sue in small claims court without needing a lawyer, and the process is simplified.
You will however want to hire a process server to actually serve the summons and complaint on the defendant (this is true for all litigation, but especially true if you need help with doing a "skip trace" (locating the defendant), or performing an out of state serve). You can find process servers by contacting your local bar association and asking for referrals.
For help with your small claims case, see: http://courts.ky.gov/resources/publicationsresources/Publications/P6SmallClaimsHandbookweb.pdf