Free speaker sent back to Virgin - I'd like to rebook

I was at work a couple of times when ukmail tried to deliver my speaker and after roughly 3 weeks of unanswered emails and their website that won't allow me to rebook they've finally ackowledged that they have sent it back to Virgin.  

Does anyone know how i can get this rebooked/redelivered please?  

Apologies if this is posted incorrectly, its my first post so be nice

Thanks, Neil