it started three days ago...i begun to receive strange calls from numbers (like the one above) that i don't recognize.  when answer, the line is silent and they don't leave a message, but call at least 4-5 times in a row.   i've received calls early in the morning and late in the evening.  

here are the others number: 035-324-1847; 305-324-1145; 305-324-5047; 305-324-5127; 305-324-2166; 305-326-7575

Does anyone know how to stop these calls?