If I bought a Xbox from Argos and used it once can I return it?

no! "the argos returns policy states products returned argos ***unused***, in original undamaged packaging... 30-day money-back guarantee not apply video game consoles important read specifications located on box prior installation or purchase of device."

read full disclaimer here:

http://returnspolicy.net/a/argos/

i bought xbox play halo 4 there wasn't enough memory install disc 2 , saw 250gb £40 more , want instead

Consumer Electronics Games & Gear Xbox Next