Change : 

if (.@freebiecode$ != .@FREEBIESCODE$) {
	mes "[ ^0000FF Freebies^000000 ]";
	mes "It's either you mistype it or you really don't have the code";	
	close;
}

to : 

for ( .@i = 0; .@i < getarraysize(.@FREEBIESCODE$); .@i++ ) {
	if (.@freebiecode$ != .@FREEBIESCODE$[.@i]) {
		mes "[ ^0000FF Freebies^000000 ]";
		mes "It's either you mistype it or you really don't have the code";	
		close;
	}
}