We don't pay for your damage property while in our care

We took a flight from East London to Johannesburg on the 13th of June flight no: 243. After landing at OR we picked our bag and notice that it was heavily damaged, we immediately went to the FlySafair offices where we were advised where to go and report the matter. We did and after few days of following up we got a reference no:*** from Sky. Another email came through after 2 weeks of following up and being taken from post to pillar, they asked the value of the luggage bag and receipt. We advised them that we bought the bag 5years ago and we clearly have no proof of payment at this point for it but the estimate was 2700 as it was on sale when we bought it. After no communication for weeks and my husband kept calling them with no clear indication of what's going on their side, yesterday we got an email that they will compensate us for 500 and they take no responsibility for people's bags that are on their flights. The same bag we had to pay for it to travel with it. I can not explain the level of annoyance we have with this company, the 500 will probably be enough for all the calls we have made following up this nonsense.