STILL WAITING FOR STATUS

I FILED BY MAIL OVER 2 1/2 MONTHS AGO. (JUNE 17, 2021)  AT "WHERE'S MY REFUND" IT SAYS "WE CANNOT PROVIDE ANY INFORMATION ABOUT YOUR REFUND."  HOW DO I KNOW IF THE IRS EVEN RECEIVED IT?  THAT'S IMPORTANT TO KNOW! CAN I CALL THE IRS? HAS THIS HAPPENDED TO ANYONE ELSE?