Shadab Vansiwala

Hello, I need some advice regarding a name change issue with HMRC. A few months ago, I updated my name on the Government Gateway, and the change was reflected correctly there. For the sake of anonymity, my original name had the format ABC DEF HIJ, and my new name is KLM NOP. However, I recently received a letter from HMRC where my name is listed as KLM DEF NOP. This is incorrect, as "DEF" is not my middle name, it used to be a part of my first name. On the Government Gateway, when I try to initiate another change of name process, my name is correctly shown as KLM NOP with no middle name. It seems there might be a mix-up with HMRC's records. Can anyone offer advice on how to resolve this issue? I want to ensure that all future correspondence reflects my correct name. Thank you for any guidance!