Bad service

On Friday evening I did a booking, the system kicked me out on the payment process, did not get confirmation that my booking went through, I then receive an SMS from my bank, check my emails for confirmation of the booking for the flight that was leaving Port Elizabeth 10:40 nothing on my email not even an SMS, now I get to the airport they tell me I need to pay stand by fee for the next flight, and they will check with IT what happened and then will might refund me, I mean I even showed them that I did not receive booking confirmation online and even also on my email, so I need my refund on this matter and need this solved, really bad service and my first time traveling with Mango, it's really dissapointing,