I bought BTCs from bitcoin.com.au around 20 hours ago and it is still showing 0 confirmations in my wallet. I checked on the blockchain.info (I am only a newbie) and to me it looked as if the bitcoin address from which they sent had unconfirmed deposits into that account. Could it be the reason for my transaction not being confirmed? What happens if the transactions doesn't go through for a few days and get lost? does the coin go back to the seller/sender OR he can double spend by associating the higher network Fee?
PS: the transaction is b93bf20e7c4a0e52a0332f7eb3607be6ef75c00101267294141c8fb60f6ff060 Fee per byte 187.668 sat/B