seasoned It sounds as if you are not a member of BA Exec Club? If you are - log into the web site and use the Contacts there, otherwise, this is the information listed. Also, I presume that you have a copy of the form you filled in? Or was it an online claim form and you have a print-off?
Baggage Claims
They only list a UK number on 0870 but try this:
+44 191 490 7901
Fax: +44 20 8759 4314
Monday-Friday
08:00 to 18:30 GMT
British Airways
Baggage Claims
Unit (S506)
PO Box 5619
Sudbury
Suffolk
CO10 2PG
Sorry if that is all the information that you currently have but faxing letters may be best, particularly given the time zone problem. The advantage of fax is that you get a time stamp and a positive confirmation of delivery that you do not get with e-mail.