Changing feedback

[37d9b214]

Hi Upwork Team!

I did task for a clietn, he was very happy with my work and left me excellent feedback and rating but after some days he file case in his finanational bank and ask for refund. so upwork refund all payment knowing that job is successfully completed. I think  client is Scamer because he posted job for $70 and hire 3 freelancer. but today when i recheck job posting he just paid  $70, means he scamed with other 2 freelancer. now I want to change feedback is it possible upwork allow me to change feedback?

will upwork monitor this client behaviour with other freelancer?