No Refund or Stimulus received

 

Mailed in 2018 and 2019 tax returns and they were delivered UPS April 16th. I haven't received my refund or stimulus check.  When I check online for refund status it says "Refund Status Error Information Doesn't Match".  I can't seem to get any assistance when I call either.  Is there anything further I can do since it's been 13 weeks?