don't disturb me in sleeping

Every like sleeping but I loves sleeping.I sleep up night 10.30 to morning 7 o clock(in leave days upto 9 o clock.I like to saw dream when I sleep.But in some day my sleep will disturbs.There is a doby in our hostel. In some doys at morning that doby knocks my room loudly and he speeks loudly for cloths to wash.From our room we never give clothes .Even he always do the same.He do this roll for half hours that upto all the hostlers will walk up.He do this twise a week.A boy like me he is a real berdan.But we are help less we cant do anything.So I decides to sleep a lot after a job got.