Correct my sentence: 'I have done something wrong and i need to apologize'

i have done something wrong and i need to apologize.But i don’t know how to write it. “i am wrong” it seems like “chinese-english”

forgive my stupidity? dumbness?

appreciate it.

You can say ‘sorry for my mistake’.[YSaerTTEW443543]

TOEIC short conversations: A customer complains about bad service[YSaerTTEW443543]

how about “forgive my mistake”?

and what is the difference between outfit, clothes and attire

thanks for the answer