Try this.
prontera,1,1,1 script NoChatVendPront -1,{
OnWhisperGlobal:
OnInit:
setcell "prontera",1,1,312,392,cell_novending,1;
setcell "prontera",139,129,139,173,cell_vending,0; // Line 1
setcell "prontera",141,129,141,173,cell_vending,0; // Line 2
setcell "prontera",143,158,143,173,cell_vending,0; // Line 3
setcell "prontera",145,158,145,173,cell_vending,0; // Line 4
setcell "prontera",147,130,147,173,cell_vending,0; // Line 5
setcell "prontera",164,130,164,173,cell_vending,0; // Line 6
}