If your funds are still in your wallet, the registration may have not been processed correctly. Which username did you try to purchase?
To register a username, you will have to fund your wallet with the appropriate amount of BTC for the registration to be processed, and keep your computer open/online until the following transactions have been completed:
NAME_PREORDER transaction, sent to the Bitcoin network with fees determined by bitcoinfees.21.co
– Once the
NAME_PREORDER transaction has been included in a block, your browser waits for 6 blocks. After the 6 confirmations are received for the
NAME_PREORDER transaction, a
NAME_REGISTRATION transaction is issued.
– When the
NAME_REGISTRATION transaction is included in a block, the name will appear on the Blockstack ID you registered it to.