Poor service, unwilling to assist booking error

On 02/03/2015, I tried to book a flight via the Mango website for 06/04/2015. While the payment went through, the site displayed an error message. I never received a ticket via email (or any other media).<br> <br> I emailed Mango about this on the 13th, 17th and 25th of March, to no response. I called their helpline, and waited for 37 minutes for the next available consultant, before giving up and hanging up. I then posted on their Facebook page, after which I miraculously received a response.<br> <br> I then exchanged emails with them (they rep**** this time), explaining what had happened. I'd made alternative travel arrangements by this stage, and did not want the ticket (as far as I saw it, the transaction was unsuccessful, since I never received a ticket).<br> <br> The case was apparently sent to the IT department, and 17 days later I received the following response: \Payment went through