Hello & Welcome to Just Answer,
Sorry to hear of any issue with using this device.
What you were told about being "easy to use" is somewhat correct - as long as you give yourself a little TIME to connect the device and EXPERIMENT with it, and get used to its operation.
To start, let me first say that you will want to unpack ALL components from the box, to make sure you have everything.
You SHOULD have a "Quick Start Manual" in the box, and that may get you started - in connecting the device to the vehicle mounting mechanism, and also the Vehicle power adapter in your car.
Let me also send you a link to the FULL manual for this device (in PDF form), so you can look that over when it comes time to use the device.
Click here --> http://static.garmin.com/pumac/nuvi_57_58_67_68_OM_EN.pdf
While you are doing that unpacking, I will see if I can find some other resources that will take you through the basic steps of using the device.
Let me know when you have everything unpacked.
Thanks, ***** *****
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Please let me know if you change your mind or have any more questions - about your device - now or in the future.
Take Care, Greg A.