if you have evidence i can help you
Steam messages automatically removed when you logged out but you can check his trade history as you can see i sent him an knife on CSGO and Arcana on dota 2
Contacting steam can't be helpful. I have a tested and guaranteed solution to find his real IP address in no time .
Pm me and write my gratuity, i will tell you how this can be done easily.
By the way, his real name is Kevin Te
i think kevin te is not his real name he is just using a name of other person