Did I receive the wrong Modem/Router? Upgraded from XB6 to XB3???

I was offered a free upgrade for my Wi-Fi. I currently have an XB6 but just received an XB3 in the mail as my "upgrade". I feel like this is wrong and that I received the wrong equipment. Going from an XB6 to an XB3 is not an upgrade. That is a downgrade considering I had upgraded FROM the XB3 to the XB6. Did I receive the wrong equipment in the mail?