complain ASAP to your credit card company - it's illegal to sell goods as new when they arrive used. get a chargeback and take your money elsewhere. note that expansys MUST pay for the cost of returning their device - they might say they will only refund when you return it at your own expense, they cannot do that.

PLEASE also complain to their local trading standard office as they are pretty good at dealing this sort of crappy service:
http://www.tradingstandards.gov.uk/manchester/

tell trading standards of expansys' address:
http://www.expansys.com/locations.aspx

good luck!