Don't you think it's scam?
Chats from support get deleted frequently and that alone cannot be a factor for determining it to be a scam. Wait for a couple of more days before actually claiming it to a scam. A few new companies that don't have much customer base tend to work slower. Though you should have waited for a refund first before sending it manually. There s no point of sending it twice and then expecting the other person to return the half of it. So yeah looks like you've been ripped. Be careful in the future and buy from the trusted ones only.
But not replying after the payment is made and showing they are online, don't you think it's fishy?
btw I contacted them today 3-4 times and 1st they said your deposits are not shown in their database yet until I show them both the deposit tx ids.
They said I will get refunded after talking with them for like 2-3 hours wasting time ...
Let us see what happens now.