Purchased a small amount to try it out, sent btc to the first address credited me after first confirmation. Exchanged for diet bitcoin all seems good so far...

Decided to invest a little but more so it generated me a new btc address on the same account as first purchase.
This amount of btc has more than 2 confirmations now yet I’m still to be credited the btc to exchange to diet bitcoin.

No support or help section?

Please advise me from here to credit my btc thank you