Zync Tablet — Denial of service

Address: Bangalore, Karnataka

Hi, I bought a zync Z1000 Tablet on 25th July form Home Shop 18 bearing order no :[protected] for Rs10990, it went faulty on April 26th 2013 and I sent it for service and they received it on 29th April 2013, since then I have called the multiple times and even after 3months my tablet is not repaired and they have not returned it, whenever I call then they say that will send it out in a week and never do that, I have not got my tablet back even after 3months, please help me.