The details for the centre are as follows:
Nintendo Service Centre,
CoDEstorm House, Walton Road, Farlington, Hampshire, PO6 1TR.
Tel - 0870 6060247 (Calls charged at the National rate)
Service Centre Hours 08.30 to 19.00 Monday to Friday (Excluding Bank Holidays)
As it stands; CoDEstorm House looks to be a call centre/contact centre for IT companies. Their details are as follows:
CoDEStorm plc
CoDEStorm House
Walton Road
Farlington
Hampshire
PO6 1TR
Tel: 02392 383999
Fax: 02392 383444
http://www.codestorm.co.uk/(Note - the very same address is provided for Nintendo CS!)
I haven't tried contacting the 02392 number and asking to be put through to NintendoCS - I guess I could give that a go.