user99640: I paid over 12k for bitcoins and it was sent and I have a copy of the bitcoin transaction.  I have not received the amount into my wallet. Is there any way that I can still retrieve my bitcoins?  It has been 3 days now and they provider is one that I have used before and I trust that the bitcoins are there but I need to find a way to access them.

user13866: If your wallet is a custodial wallet where the private keys are managed by the provider, your only recourse is to contact the provider.
If your wallet is a non-custodial wallet where you manage the private-keys yourself, there are several possibilities

check that your wallet is fully synchronised.  How you do this depends on which wallet you use.
check the transaction by entering the transaction-id at several blockchain explorers. The business or person you bought the bitcoins from will be able to tell you the transaction-id and receiving address (it might have been printed on a receipt, mentioned in an e-mail or in a text-message etc)
check that the output of the transaction was sent to the correct Bitcoin-address. You can see the actual recipient addresses of the transaction in a blockchain explorer. Your wallet should be able to show you a list of the receive-addresses it has generated. Wallets nowadays generate a new receive-address for every transaction.


99640: <p>I paid over 12k for bitcoins and it was sent and I have a copy of the bitcoin transaction.  I have not received the amount into my wallet. Is there any way that I can still retrieve my bitcoins?  It has been 3 days now and they provider is one that I have used before and I trust that the bitcoins are there but I need to find a way to access them.</p>
 13866: <p>If your wallet is a <a href="https://bitcoin.stackexchange.com/q/81240/13866">custodial wallet</a> where the private keys are managed by the provider, your only recourse is to contact the provider.</p>

<p>If your wallet is a non-custodial wallet where you manage the private-keys yourself, there are several possibilities</p>

<ul>
<li><p>check that your wallet is fully synchronised.  How you do this depends on <a href="https://bitcoin.org/en/choose-your-wallet" rel="nofollow noreferrer">which wallet</a> you use.</p></li>
<li><p>check the transaction by entering the <a href="https://learnmeabitcoin.com/glossary/txid#targetText=A%20TXID%20(Transaction%20ID)%20is,number%20for%20a%20bitcoin%20transaction." rel="nofollow noreferrer">transaction-id</a> at several <a href="https://www.google.com/search?q=blockchain+explore" rel="nofollow noreferrer">blockchain explorers</a>. The business or person you bought the bitcoins from will be able to tell you the transaction-id and receiving address (it might have been printed on a receipt, mentioned in an e-mail or in a text-message etc)</p></li>
<li><p>check that the output of the transaction was sent to the correct <a href="https://en.bitcoin.it/wiki/Address" rel="nofollow noreferrer">Bitcoin-address</a>. You can see the actual recipient addresses of the transaction in a blockchain explorer. Your wallet should be able to show you a list of the receive-addresses it has generated. Wallets nowadays generate a new receive-address for every transaction.</p></li>
</ul>
