Sort:  

I did it .. thanks @gmgh . I went to wallet on my steem profile > permissions> active
Activated it > copied the adress provided > and copied it in the exchanger website when they asked me where to send the coins.

I don't have wallet . Actually I downloaded steem wallet from Apple Store on mobile , but seems not working. Do I have to have a wallet? Can't I buy and just get a code for my coin and add it somewhere in my wallet here

I did it .. thanks. I went to wallet on my steem profile > permissions> active
Activated it > copied the adress provided > and copied it in the exchanger website when they asked me where to send the coins.