Firstly, we need as much info as poss to help you.
giving the web site, from which you're likely to have ordered from, would have been good.
http://www.office.co.uk/

Any addresses would have also been welcome

Mail Order
Unit 2
Auriol drive (off oldfield lane north)
greenford park industrial estate
greenford
middlesex
ub6 0tp

Head Office
9-10 Great Sutton Street
London
EC1V 0BX

For once, the scum at ufindus have become of use rather than their usual pain in the *ss selves.
Office Holdings > Shoes And Trainers in London Central
Tel: 020 74905003 - 9 Great Sutton Street, London, EC1V 0BX

BT.com gives
Office Holdings Ltd

Warehouse
Tel: 020 87477040
Unit 3 Auriol Dv, Greenford UB6 0TP

Office Holdings Ltd

Tel: 020 74905003
9 Great Sutton St, London EC1V 0BX

Fax: 020 74907733

Mail Order
Tel: 020 75663070
9 Great Sutton St, London EC1V 0BX