The responsibility, for the phone, issues, exchanging, sits with Carphone Warehouse up until Oct 2020. You should have gone to them in the first place. I woukd go back to them ASAP and explain what's happened and get them to confirm if you were indeed give a brand new replacement or not
often Samsung (and other oem manufacturers) only send refurbished phones on warranty exchange rather than an brand new phone. It is a pretty controversial love when you have a new phone. for the first 28 days Carphone Warehouse will exchange a phone new for new. After this length of time they send it off through the manufacturer. Again you may get a refurbished phone rather than a new one.
Hi, can you clarify what the issue actually is? You purchased note, which was faulty. Got replacement from Samsung. Do you have a mint condition, working Samsung Note? If so, slightly unsure of issue? The new one may have been refurbished? The replacement could be a new one or refurbished? Sorry, if I'm confused here.