and they don't answer when you call them

yes it is Centennial Windows.i Just call that number!

It was Centennial Windows; 3 calls in a month.
I called them back and asked to be removed form their list.

If they do not stop I will escalate my complaint.

No message left, but have read elsewhere that this is cold calls from Centennial Windows.

Funny thing is, I told them last year not to call me!!

If I'm interested in your products, I'll call you.

Now that they keep bugging me, I won't deal with them when I do want windows / siding.

Get calls a couple times a month.  They never leave a message.