Please help,my boss have writen me a letter saying i have been stealing his companys money,?

from that letter i replied him with a letter telling him, i didnt steal his money,that he is the one who always takes money from the safe box then atfer some days he will confess to me as her accounts clerk. he will just take the money without letting me know and he will say it only when i ask him. i suprised this time around he didint admit it. by doing that he is saying he wants to demote me to be a cleaner but without any hearing! is it good to do that? please help!