The following links may help you solve problems with popular wallets on your own:
Desktop Wallets
Locked out of a wallet like this one?
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JAXX: https://decentral.zendesk.com/hc/en-us
KeepKey: https://support.keepkey.com/support/solutions
Ledger Nano S: https://ledger.zendesk.com/hc/en-us
Multibit: our Multibit recovery guide
Trezor: https://trezor.io/support/
Bitcoin Core: official help pages and community help on Bitcoin Stack Exchange
Electrum http://docs.electrum.org/en/latest/faq.html#
Electron Cash: https://github.com/fyookball/electrum/issues?utf8=%E2%9C%93&q=is%3Aissue
Daedalus Wallet: https://iohk.zendesk.com/hc/en-us
Exchanges
Coinbase Support Site https://support.coinbase.com/
Poloniex: support@poloniex.com
Online Wallets
BitGo: https://bitgo.freshdesk.com/support/home
Blockchain.com: https://support.blockchain.com/hc/en-us
Bitcoin.com Wallet: https://support.bitcoin.com/en/collections/2050805-wallet
Coinapult: support site unavailable
Coin.Space: https://coinspace.zendesk.com/hc/en-us
Cryptonator: https://cryptonator.zendesk.com/hc/en-us
GreenAddress / Blockstream Green: https://blockstream.com/app/
DigitalBitbox: support@digitalbitbox.com