Not sure if it's appropriate for your situation but here's a page I've found for initiating a complaint about UKVI's service: https://www.gov.uk/complain-uk-visas-immigration

Hi there Here is a strange mistake/error/issue on the side of the immigration office (caseworker or computer error?) that I'm not sure how to redress. Applied in mid-December 2021 for a standard UK Visitor Visa. Received the email notification of the decision (refusal) in mid-January 2022. The email...