Buy USDC via coinbase (use a debit card to be able to transfer funds immediately to another account)
hit "send to another wallet"
select your USDC as currency, input the wallet that QSC says it'll say (USDC VIA SOLANA)
once you have wallet selected and confirmed you will see the SOL network and it'll say (few cents) fee or something... go ahead and send it.. once its cleared on the blockchain click view on blockchain in the app it'll bring up a screen where it says "signature" on the bottom of the transaction, click the little button that lets you copy and paste it. Send that screen shot along with the hash id you copy pasted to tracy, do not message again after asking for confirmation as itll push your post to the bottom delaying response and product.
hope this helps