The book depository bad customer service, stolen money, blamed buyer United Kingdom Internet

After being a loyal customer for over 4 years, spending thousands of dollars on their site i have placed an order on the 11th Spetember 2014  and the books have been sent to the wrong address. 
i contacted them on the 12th September 2014 about a change of email and requested the confirmaiton order for the order be sent to the new one as i had been hacked and unable to view it. 

No reply came, fast forward a month with no books and i message them on the 20th October 2014 asking about the books to be told they were sent to a previous address of mine that i no longer live in. 
I contacted the post office, current renters and the book depository about it all and the post office and current renters of the address they were sent to all said they did not recieve any parcels for me. 
i have singed witness statements from 3 people whom were wtih me at the time of purchase who confirmed for me that i had put the correct address as it was a new one and i wanted to be sure. This is a site malfunction that they have now said i will have to wait and see if the books are returned (could take months) and if no books are returned it is not their problem. 

The blame is 100% theirs. i did all the correct things, i changed the email address right away, requested a new confirmation order and now have done everything i can to get the company to work with me on a solution. 
They have taken to ignoring my emails and are not willing to help me with this issue. 

I did not ask for a refund, i asked that the books be sent to the correct address. The confirmation order says the correct address on it and did so before i messaged them, after messaging them i looked and it was changed to the address they had them sent to. I then requested it be changed back since there was still 3 books on that order yet to be sent. It took 4 emails before i was listened to on changing the address back to the correct one. 

The book depository will not cooperate with me on this issue and have taken to ignoring my pleas. I feel wronged after so many years of loyalty to them and would just like this corrected. 

i have all statements, emails and screenshots of what has gone on yet they still hold no blame and have said its now up to me. This does not seem correct that i am being turned out of a large sum of money due to their website making a mistake and them hiding it and shifting the blame onto a customer.