There are many wallets holding your bitcoin and all them have different ways of recovery. The most common are;
blockchain.com – custodial wallet holding your keys
Bitcoin Core – typically the keys are stored in a file called wallet.dat
Multibit HD or Multibit Classic – A defunct bitcoin wallet that was very popular a few years ago
Trezor One – The most popular hardware wallet
Depending on your wallet type the guide differs.
For blockchain.com wallets check this guide blockchain.com
For Bitcoin Core wallets check this guide wallet.dat recovery
If you still did not manage to recover it, then send mail to us and we will try to help
Contact us: keychainx@protonmail.com
Stay Safe!