Absolutely USELESS

I tried logging a complaint on 5 August via the eservice portal, which proved unsuccessful. I then emailed my entire case, including a WeTransfer link with all relevant attachments, to *** on the same day. I received no autoresponse, nor did I receive a notification that my WeTransfer files were downloaded. I tried to email them again today to request that they confirm receipt of my original mail when I received an autoresponse saying that "the email address only accepts emails from people in its organisation or from the approved senders list". Now, I ask you, what is the point of having a complaints email address for the public to utilise if you set it to not accept external emails???? Who, if anyone, is in charge of the NCC & can they kindly educate their IT department on what a "public email address" is!!?