After you have purchased Bitcoin via the Bitvice platform, you will receive a confirmation email which contains information regarding your transaction. One of these pieces of information will be your TX ID (transaction identity) which is a unique link to your specific transaction on the Bitcoin blockchain. Since Bitvice settles your Bitcoin to the Bitcoin address that you control, you will be able to track the transaction on the blockchain.
To track your transaction, copy and paste the TX ID into a block explorer such as:
This will show you the status of your transaction. It will either be in the Mempool, meaning it is waiting to be broadcast still. Or it is unconfirmed, meaning that it has been broadcast but has not yet had 6 additional blocks of transactions chained onto the block that it was broadcast in. Finally, it can be confirmed, meaning that it has arrived in the destination address, with more than 6 blocks chained onto the block that it was sent in.