The IRS says they sent my federal refund in February. As of today, I still have not received it. The on the phone support system is broken and will not take my support ID

There's a process in place in case you lose your paper check or if it goes missing. You can ask the IRS to trace it by calling 800-829-1954, or by filling out Form 3911, "Taxpayer Statement Regarding Refund."

The IRS will determine whether the check was cashed, and it will issue a replacement check if it wasn't. Otherwise, it will create a claims package that includes a copy of the endorsed, cashed check.  Following a review of the information, including the signature on the back of the cashed check, the agency will decide whether to issue a replacement check. This process can take about six weeks.