It says my refund was delivered today 02/21/2018 but I have not received anything in my bank account?

[AkinaLO]

It takes additional time for refunds to be processed after leaving the IRS, and for financial institutions to accept and deposit them into bank accounts. Also, many financial institutions do not process payments on weekends or holidays, which can affect when refunds reach taxpayers. For EITC and ACTC filers, the three-day holiday weekend involving President’s Day affects their refund timing. Here's more information https://www.irs.gov/individuals/refund-timing.