You can contact aCar support for reporting bugs/problems you've encountered into, request new features or improvements you would like to see, ask your questions or request help...
Please launch aCar on your Android device, go to Advanced Dashboard screen and scroll down to Support block. There you'll find the corresponding links to contact the support (pointed by red arrows on screen shot).
Note: This is the only way to receive support for aCar. We are not able to respond to your support requests by any other way.