CF83 says completed but not received letter

Both myself & my wife completed CF83 form within minutes of each other…. My wife received her letter well over a month ago…Although my account shows CF 83 completed, I haven’t received my letter…please advise

Hi MarieAnne,
Please contact the National Insurance helpline to check the progress of your application. You can contact them on +44 191 218 7777. Lines are open from 8am to 6pm Monday to Friday. Alternatively, you can use the webchat facility which can be found here -
National Insurance: general enquiries - GOV.UK (www.gov.uk) Please choose the option ‘Ask HMRC online’.
Thank you.