I got the following from the GCC yesterday:
Thank you for your letter. A member of staff who deals with the administration of complaints will be in touch with you within two working days with full details of our process for dealing with complaints. In the meantime please be assured that the GCC will not disclose your details to anyone other than the respondent chiropractor in each case. This will not happen until the relevant stage in the process, which will be set out in the full details my colleague will be sending to you.
Chief Executive & Registrar
At least we know they received my complaint (if we didn’t know already).