Waited to over 3 weeks for a response!

I started the booking process on a Groupon product, during the payment process I was disconnected from the internet and unable to complete the booking/payment. However, when I went back to try and restart the booking process it wouldn't let me as it said they were currently processing my payment on my previous booking for the same product. I knew that I hadn't made the payment and so I emailed them asking them to please cancel the 'process' so I could restart the booking process, there was a 20% discount on the product but only for 48 hours. It took them 3 days to send an automated response and then another 3 weeks before a consultant actually emailed me today and just said, \sorry