Paid National Insurance voluntary contributions and need to know if money has been received

On February 12th 2025 I paid NI voluntary contributions for the missing years that I was eligible to pay. I have tried to call, email and chat with the chatbot at HMRC to check if this money has been received. I have been disconnected after calling and waiting for over an hour ( living and calling from abroad), I have not received an email reply and the chatbot is of very little help and says there is not real person advisor available to chat with and can not say when one will be available. I also sent in the completed form IPC SU 117 to HM Revenue and Customs, Newcastle upon Tyne, NE98 1ZZ on February 13th 2025. I understand that HMRC is very busy but there must be someway that they can automatically inform me that they have received my payment, HMRC is in the business of collecting money. I am already of pensionable age ( 66 years old) and receiving a small pension from previous earned contributions. I have also contacted the Department for Work and Pensions to try and get an answer and have not heard from them either. I understand that it may take an extended period to assign the contributions to my NI record but I want to know that it is in the process of happening. Please let me know a reliable way to find out if my money has been received and when the paid voluntary contributions expect to be allocated to my NI record. This situation is very frustrating. Thank you for your help.

Hi rlpoh,
Our systems do not currently issue automatic confirmations of payments received and they only confirmation you can receive is direct by contacting National Insurance 
Due to the high volume of customers trying to make voluntary contributions for periods abroad, it currently could take up to 67 weeks for our caseworkers to allocate your payment.
If at any point you fall within 6 month of your State Pension age or you are already state pension age, and your payment has still not been allocated, please contact the National Insurance department on 0300 200 3500 or +44 191 203 7010 if calling from outside the UK. This is the only exception we can consider in escalating an allocation. 
You can use the webchat function ‘ask HMRC online’  Ask HMRC online
You can also write in to:
PT Operations North East England
HM Revenue and Customs
BX9 1AN
When submitting your correspondence, kindly provide your National Insurance Number, full name, current address, a contact telephone number, and a brief explanation of the purpose of your letter.
Additionally, please remember to sign and date the document, even if it is printed.
Thank you.