I really not expected that things will go so wrong. i tendered pardon, but things not changed and gone worse?

my friend met an ugly event. he has gone to invite his friend for his sister's marriage. He saw the name board of his friend near the doorstep and he knocked the door and in the intension to get inside the flat he left the shoe outside with socks. A pretty woman opened the door and on enquiry, she told that my friend moved to Ist floor B. he left the shoe there and gone ist floor. After 25 minits, he came down and witnessed that the woman found outside and scolded me for leaving the shoe in front of doorstep. now, i wil take and tendered pardon. The man her husband came outside shouted towards my friend in a filthy language and asked my friend how long he is having connection with his wife.. shocked friend tried his level best to explain him, but none he heard. my friend is tried his level best, even the ist floor friend also supported my friend with proof of invitation. but, in vain. What kind of method would satisfy him and his wife very innocent. help my friend please..