Evri complaint: Complete lack of communication about delayed parcel

My parcel from lookfantastic was due to be delivered on 24th November. I was advised twice during that day that it was delayed by an hour but would still be delivered. I then received a message saying it would be delivered next day. That didn’t happen. Or the next day. I have chased this up every single day to be told by the chatbot a member of the team is looking into it. I was advised by someone called claire via email that she was personally taking care of it and it would be delivered on Sunday 1st December and she’d call me on Monday 2nd December by 10am to it had been delivered. It was not delivered and I received no call. I emailed her to advise of this. No reply. I emailed her the day after, no reply. I have tried the phone line, but am constantly advised someone is dealing with I and will get in touch within 24 hours. 10 days after the parcel should have arrived I’m still no further forward. I’ve requested the address for complaints and received nothing in return.