Gave away my tickets

On the 19th of July I booked my flight for a very good price on the website for end of November December time and paid with Zapper. Everything went smooth and payment was successful. I had no reason to check the booking as I got a email with the invoice. Time passes and it's almost time to fly and I usually check-in a day before we fly, but this time I just check a day earlier. I get a notice saying my booking was cancelled and I immediately check for emails or messages that they send but got nothing. So the next morning I phone them. This is now a day before our flight. They said it was cancelled because they didn't get payment. I have all my proof of payment and told them. So they tell me to wait and they'll check for me. The person tells me they see the payment did go through but they didn't pick it up. They told me they can't help because the flights was full and I needed to fly that day as we had pre booked parking, rented a car and paid for accommodation. I couldn't fly earlier as I had work to do that day. So then they told me they would have to refund me. I was furious as I had to book 24 hours before a flight that was incredibly expensive costing me double my original price. No matter what outcome I would have to pay extra or loose money. we got flights with Cemair but was 4 hours later. I had to phone so many places to amend my times. I completely feel I got ****** from Flysafair as there was absolutely no communication. Not saying even would I like to retry the payment (that would help because they payment was through) but nothing. They told me I should have checked the booking earlier. But I had no reason to check the booking. They gave me a refund but I had to pay R7885 more in just to get flights and that is money I'll never see again. I feel it's unfair that they just gave my booking up and wipe they hands and say sorry but now it's your problem. Never again will I ever fly with them!!!!