Alocation of payment failed and no notification

I bought a product of over R2000 from Groupon. with no notifications coming in, after 24 days I called them only to find that they could not allocate my payment so they had to refund me. this is ridiculous as they know and themselves say payments would take up to 5 days to reflect. mine took 2 days but still. I had to call to query what is up and I was told this ridiculous story after being on the line for more than 15 minutes holding for assistance. this is unprofessional and I am proudly saying one wrong move is enough to lose me. you have lost me and I wonder if I will ever be interested in buying staff from you. I mean I buy something with my hard earned money and I get this, to top it all they don't refund my bank charges accrued. this is really not on