Possbile to cancel RMA Request?

Hi Community,
I have an MSX-510TXUP Switch where one of the fans is broken. I started the RMA process with Netgear support, however this got stuck (as seems to be a usual problem). It's no longer possible for me to contact Netgear using e-Mail (because the support case is closed and I can't open a new one). I have not received any e-Mail for the RMA, but I did leave some credit card details.

Since I bought the switch on Amazon less than two years ago they have accepted a return. I no longer need to RMA the device. How do I cancel the RMA? Calling Netgear is unfortunately not an option for me. Does anyone know if it's possible to cancel a RMA in progress?

regards