Non performance 4 months after deposit

I paid over the required deposit to Woodys Wendys and log cabins in November 2014 , after they promised to erect my wendy before christmas 2014.After several calls , e mails and promises they still have not erected my wendy , and neither have they contacted me to arrange for a date of erection. They are not answering their phone and are ignoring my e mails. Please don't be caught by their impressive website and long contract .