Contacting HMRC for an update on my UTR

Hi, On 16th July 2024, I registered for Self Assesment for the first time, and according to the tool here (https://www.gov.uk/guidance/check-when-you-can-expect-a-reply-from-hmrc), it says I can expect to receive a reply by 23rd August. However, it's nearly the end of September, and the 5th October deadline to inform HMRC is nearly past, yet I have not received any code in my mail. It tells me to contact HMRC, but both the phone helpline and online chat says advisors are not available, but I can't get an update without contacting them. What should I do in my case, because did I maybe not submit the form properly? Should I try to resubmit the form before the 5th of October, or should I just wait?

Hi,
Unfortunately, it is not possible to review personal matters in this forum.  
For individualised assistance please contact our self assessment helpline or contact our webchat:  
Self Assessment: general enquiries
Thank you.

Hi Admin, But that is part of the issue, https://www.gov.uk/government/organisations/hm-revenue-customs/contact/self-assessment doesn't even work as there's no advisors available to speak to when i call, or chat to when i use the webchat, so i cannot even learn about what's wrong by contactigng them. Is there any way to ensure that i can get an advisor. I did try to register again, so hopefully i get the mail in the post this time.

Hi
You would need to contact Income Tax: general enquiries