Refer to this: Aerosoft Simple Traffic
It is pulled from the Xbox marketplace due to multiple bugs in the software. If owned, it will still work even though it was pulled.
To request a refund, please click the link, which takes you to MSFS Zendesk and select “I would like a refund” and complete the form. https://flightsimulator.zendesk.com/hc/en-us/requests/new