Living Social policy

I have bought a Living Social deal for a restaurant in the city where I live. I do not understand how to redeem it as it all seems to have changed. I have downloaded the voucher and looked at the email they have sent. Today it is 8 May and in the main part of the voucher it says the voucher is valid until 12 August 2016, but where the voucher code is, at the top of the page, it says it is valid from 3 May to 12 May. On the email it says that I must validate the code by 12 May. I have been caught out before by Living Social. Their office is shut over the weekend and I have tried phoning the restaurant. The person who answered the phone had no idea and said the manager would phone me back, but guess what? Anyone any ideas please.:(