Don't follow their own terms and conditions
Had a problem with a voucher and tried to cancel it for a refund within the 7 working days like it said I could in the terms I agreed to when purchasing. They kept coming up with reasons for not refunding it, and making me run around contacting different people, before coming back and saying they weren't refunding it, and not even giving a reason. I had to contact my credit card issuer and have the transaction charged back. Was a lot of hassle, would never use livingsocial ever again, and would actively discourage others from using this company.