take it as a lesson and to the one who is trying to say its buyers carelessness.. u should be the one to be blame.. if you offer the service where got can say kena main dengan mat indon or whatever... u sell the service in your own sense you can do it.. Not do such BS and said its buyer carelessness as well.. they trusted you not they are playing and give money to u for free..
got no issue with the refund back but at least make it a lesson to urself as well don't sell product or service if you don't even can 100% confirm..
don't just shift blame to someone else especially the buyer.. your the one that convince them to do so
pfff