[Tanush123]

When they use the command just make it save in a variable that also saves in your dini or whatever,

pawn Код:

PlayerInfo[playerid][UsedRefund] = 1;

And if the person trys to use the refund command add on top

pawn Код:

if(PlayerInfo[playerid][UsedRefund] == 1) return SendClientMessage(playerid,0xFF0000FF,"ERROR: You have used this command");