Request for Assistance Regarding Two UTR Numbers and Unresolved Penalty Notices

I am writing to seek your assistance regarding an issue with my two UTR numbers. I have been facing difficulties accessing one of my UTR numbers online, and despite numerous attempts, I have been unable to log in. Over the past year, I have continually received penalty notices associated with this UTR number. I have tried to resolve the issue by reaching out through the online contact form to request the cancellation of these penalties, but I have not yet been successful in having this matter addressed. Additionally, I have mailed letters to the relevant department, but I have not received any response. Could you kindly assist me in resolving this issue and advise on the next steps I should take to prevent further penalties from being issued? Your assistance in this matter would be greatly appreciated, as it has caused a great deal of confusion and concern. Thank you in advance for your time and support. I look forward to your prompt response.

Hi,
We apologise for the problems you have experienced in trying to resolve this issue. As we will need access to your records for us to review and progress your case, you will need to contact our Self Assessment team for advice.
Self Assessment: general enquiries
Thank you.