Explanation

The error is in the phrase "Rest since one week."

Corrected phrase: It should be "rest for the past week" or "rest for a week."

The phrase "since one week" is incorrect in English.

"Since" is used to refer to a specific point in time (e.g., "since Monday"), while "for" is used to refer to a duration (e.g., "for a week").

So the correct sentence should be: "Because of the cricket tournament and organizational work, I have hardly had any rest for the past week."