the claimant shall in his or her written notice include those items that claimant believes were omitted and set forth in detail all known reasons why the claimant believes the settlement offer is unreasonable.
For purposes of this subsection, the trier of fact shall determine the reasonableness of an offer of settlement made pursuant to this part. If the claimant has rejected a reasonable offer, including any reasonable supplemental offer, and any other law allows the claimant to recover costs and attorneys' fees, then the claimant may recover no costs or attorneys' fees incurred after the date of his or her rejection.
OCGA § 8-2-38