Return problem

I returned an article to the UK Warehouse yesterday and Hobbyking just sent me now :

"Dear Customer,

We are sorry to inform that your warranty claim for RMA#131140 would not be proceeded further since we didnâ?Tt receive any response on time from you in the past 45 days in a time of application.

If you have any enquires, please contact our CUSTOMER SUPPORT CENTRE or talk to our 24/7 Customer Services Team via live chat on our website.

Thank you for your attention and support."

What can I do ? I've already sent my pack to the post yesterday.