3-5 days for a response

Bought 2 groupon deals for the same hotel, the deal fell through by the hotel who said that Groupon takes 50% of the 50% offered, thus the hotel would only make 25% of their original rate, anyhow deal was cancelled immediately,money has been refunded by hotel, wrote an e-mail to Groupon, for a refund on my credit card.The automated response was, my problem would be attended to in 3-5 days.<br> Wow, that means they must be inundated with customer queries and do not have staff to cover. Given that the hotel has said they take 50% of every deal given, surely they should have more staff