YOU SAID:

Me me big disappointment. Bad day?

INTO JAPANESE

私はとてもがっかりしています。付いてない日？

BACK INTO ENGLISH

I am very disappointed. A day that is not attached

INTO JAPANESE

とてもがっかりしました。ついていない日

BACK INTO ENGLISH

I was very disappointed. A day that is not on

INTO JAPANESE

私はとてもがっかりしました。オンではない日

BACK INTO ENGLISH

I was very disappointed. A day that is not on