random text message saying some of my items have been delivered and my local postie will complete the order as soon as possible. I order a lot online so could be legit.

NOT LEGIT. It says they are from Pet Circle and their order will come soon. Dont click on the link it’s a scam!! I don’t even order from Pet Circle! If u are a Pet Circle customer don’t even trust this

This is Phishing.
DO NOT CLICK ON THE LINK!
Whilst our household is legitimately a Pet Circle customer, this number has contacted us via a number NOT registered with them, regarding an auto delivery NOT registered with them.
Is is a bit more sophisticated than your usual spam or phishing, but there is no way it can be legit.

It is from Pet Circle

I also have items ordered via Pet Circle which were delivered yesterday, so I am pretty sure it's them...

Caller: Text saying some of your items delivered...

I think this is from Pet Circle online, I got an email with similar wording with details that my order was delivered.

I had a text msg saying my order had been delivered

How do you know it's not spam?

As with previous caller, I got a random text message saying "some of your items have been delivered! Your local postie will complete the order as soon as possible optout reply stop. I too order a lot online, but the lack of ID, and incorrect capitals seem odd.

not spam