Pays for deals and then they close deal and I lose

I paid for a deal on 27/11/2015 already, today the deal was removed from \My Groupon". My payment was apparently only received on Friday 4/12/2015. This is unacceptable. I paid for a deal way in advance and now I loose on this deal because Groupon have *********** people!! I will never waste my time and money on Groupon again."""