So I just called Tesla about this. Why do they always sound so disinterested? They really have poor customer service skills. They also hang up abruptly too at the end of the call. Honestly I am courteous and polite on the call and they are usually the exact opposite.
Anyway I was told "Delivery dates move around a lot, and they are subject to change". I told him I'm aware of that but this is an inventory order, not a new order, so the date shouldn't ever move from June to January-March 2023!
I have been expressly promised a callback, but they said the same last week and didn't, so I won't hold my breath.
I'm also still trying without success to get them to honour the £520 discount on my order.
I am really not impressed with Tesla support so far