Bitcoin transaction not in my wallet
Assuming you mean a Bitcoin transaction was made to pay money to an address generated by your wallet but your wallet is not showing the money as being received:
Your wallet should have a record of that address.
If your wallet doesn’t show the money, there is something wrong with your wallet but remember that wallets don’t contain money, they only contain the secret numbers known as secret keys. The secret keys give you control over money, the ability to spend received money. After having generated the receiving address passed to the sender, the receiving wallet plays no active part in the actual receipt of money – it just has to learn that it has happened in order to be able to show you that it has happened.