Assistance with Inquiring About Tax Number Registration

I applied for a tax number (UTR) with HMRC (UK) over 40 days ago, but I have not received any response yet. I need someone who is knowledgeable in dealing with HMRC and can assist me in inquiring about the status of my tax number registration.

The ideal candidate should:

Have experience with UK tax systems and procedures.
Be able to communicate effectively with HMRC, either via phone or written correspondence.
Provide updates on the status of the inquiry and any necessary follow-up actions.
Please provide a brief overview of your experience with similar tasks and how you plan to approach this inquiry.