2020 Refund - Unable to talk to a live agent - Need help

I filed my 2020 taxes in October 2021 (~9 months back). My Tax transcript, Account Transcript shows that I will get a refund. When I spoke to an IRS back in march of this year (2022), they said they would send the payment in 4 to 6 weeks. So far, I haven’t received any communication in this regard. When I check the status online, I see the following message. 

 

  • We cannot provide any information about your refund. Be sure to: verify your filing date;
  • check with your tax preparer or tax software provider; or
  • verify you received your electronically filed acknowledgement e-mail.

If you filed a complete and accurate tax return, your refund should be issued within 21 days of the received date. However, processing may take longer under certain circumstances.

 

I am unable to get hold of a live agent. What options do I have? Can I write a letter? If so, where should I mail it to?

 

Thanks