Before contacting us, make sure that you did not forget to close your virtual devices after using them (see How to stop a virtual device on Cloud SaaS?).
Time out does not apply to Virtual Devices launched with gmsaas. They need to be stopped manually or with gmsaas. See gmsaas user guide - stop an instance.
Virtual devices default timeout is 30 minutes (see Administration interface). If you notice that you have been charged with $1.50 for one or more device that you use for less than 30 minutes, it is very likely that it has not been properly stopped.
If you have any doubts regarding your devices consumption, please contact our support team and we will provide you with a full usage report.