Over Paid Landing fees Refund

[Sam0130]

Hi Fellows
                  Me and my family have landed back in may 2007, our case have been processed from Canadian high commission London, we have filed for our over paid landing fees refund back in July 2006, can some one advice us regarding how long its takes or any number or e-mail address to confirm it from? We have not heard any thing from them since then ...I would appreciates your reply thanks Regards