Did start BTC to XMR exchange, it just took 3k € and wouldnt send the exchange, after asking the owner on telegram, he just said i'll DM you but never did.
Like i told you, you've to wait for a 15 days to get your money back.
There was an error with your transaction, if not, i'll fully recover your funds.
With third-party API this is a huge problem. When you are taking the full responsibility of recovering the funds [which obvious you will] then you are laterally losing money out of your pocket if the third-party exchange does not resolve the case in your favor. You need something that have full control by yourself.