Is blocktrades is a scam ?

I always get a problem when I exchange steem into dogecoin. I sent 1 steem to blocktrades for dogecoin 3 days ago. I don't get my dogecoin till now. I think it is a scam.

what should I do ?

I use this site it is trustworthy : https://changelly.com/?ref_id=635c2f925fb5

Another I have 19 steem to sell . I will sell 1 steem for 700 doge.

Here is my dogecoin address if you want to buy 1 or more steem :

Contact me in email : [email protected]

I will send you dogecoin address to send 700 dogecoin. Then give your steem name and you will get 1 steem .