Class 3 Voluntary Contribution cheque

Dear HMRC, I have paid a Class 3 Voluntary contribution by cheque following the exact procedure advised, including the necessary information on the back of my cheque and the necessary cover letter. The cheque has been drawn from my account on 8/8/2023, but I have not received a receipt for the payment, nor has it been credited to my pension record, although it is now past the 6 week stated credit window. Please let me know how to proceed to be sure this payment is credited to my pension record.

Hi Andia Farrokhzadeh,

You would need to contact the NIC helpline for an update.  
You can contact them at Number 0300 200 3500, Text Relay 18001 0300 200 3500, Overseas +44 19 1225 4811 (Open Monday to Friday: 8am to 6pm Closed on Saturdays, Sundays and Bank Holidays) and Web Address www.hmrc.gov.uk/ni.

Thank you.