to insist to cancel an order because it will not arrive in the specified time of arrival?

[CoolToned]

It's in a group buying site. I bought it three weeks ago. Date of arrival is 28/09 - 03/10.

I noticed it hasn't been dispatched so I asked, and they said it has just left the international destination and will take 7 business days to arrive then another few days for local shipping.

If you don't want it, then cancel.

The site says orders cannot be cancelled though. So in this case, I am not being unreasonable because the delay is in their end?

Distance selling regulations, or whatever they've been replaced with, say you can, surely?

Assuming seller is in UK or at least EU?

I'm in Australia. I think seller is in UK. I purchased it through a group buying site in Australia.

Oh :( that doesn't help you then sadly.

Do you have any proof that the goods were to be delivered by a certain date? If so, speak to your credit card company and ask about a charge back

Yes, I do. It says so in the order details.