Should there be rely from HMRC for paper based Self Assessment?

That was my very 1st time to do tax return. Since I needed to apply for "Split Year Treatment", I needed to fill out both SA100 and SA109 in paper forms and already sent both to HMRC on 16 Oct 2023. However, as of today, 25 Nov 2023, no reply has been received from HMRC and I have just recently moved to a new address; thus having no access to my previous postal mailbox. For this, I also tried to call HMRC, but no one answer the phone after 30+ mins waiting. Wonder if there is any reply from HMRC upon receiving my tax return?

Hi Alex Wong,
Your tax return will be process in the near future.
Our Self Assessment telephone line is always busy.
The Self Assessment telephone line is open from 8am to 6pm or you may wish to contact HMRV via webchat at:
Self Assessment: general enquiries
Thank you.