The only one that would know about the processing of your return/refund is the IRS. You can try to contact them but this time of year it is hard to get ahold of them. You can check the IRS website, Where's My Refund, for information. The website updates only once a day.
https://www.irs.gov/refunds
This is from the IRS:
Mail Processing Delays
It’s taking us longer to process mailed documents including paper tax returns. We’re processing all mail in the order we receive it.
If you mailed a tax return and haven’t yet heard from us, don’t call or file a second return. Find expected wait times for current IRS operations and services.
See the following for IRS contact information:
https://www.irs.gov/site-index-search?search=contact+irs&field_pup_historical_1=1&field_pup_historic...
