Where you lost 80$ ? Have you used bitcoin to pay somewhere through bitpay like thirdparty or used it to top up other payment processors account (like neteller or skrill)?

If you have used these third party than you can contact them and they will refund your bitcoin if your transactions stay unconfirmed for long time and get confirmed only after few days.

If you have just sent it to another bitcoin address and it is still unconfirmed, it will automatically drop from mempool after few days and should be added to your balance. Don't use coinbase, xapo like wallets they are not true bitcoin wallet. Use electrum where you have full control over your coins and transactions.

No miners will not take your unconfirmed bitcoin...