[Konstantinos]

pawn Код:

format(string, sizeof(string), "Jums Liko Dar %i Sekundziu Uztildimo!", mutetimer[playerid]);

It will return the timer ID, not the time has left until the player gets unmuted.

By the way, you've used mutlaikas as integer without any index in the sscanf line but later you use playerid as index: mutlaikas[playerid]