5 star for seller but 2 star for device

I must give the seller a five star for their prompt response and utmost desire to satisfy their customer. Had issues with my first device and the seller sent me a brand new one without asking a question. But I'm a little disappointed after using the second device for more than 5 weeks. The device gives notification to format the SD card each time it is connected to power. I was re-inserting the SD card to tackle that issue. I was okay with that. I became more disappointed when I failed to play all the files on the device. It only played 3 out of 20 files but every file size is the same and also has the same file extension. Tried to play in my laptop using multiple multimedia apps but got the same result... "file format not supported." My question to the seller- If we can't play the recorded file then what's the point of using a dashcam? There is a third issue that I'm having now since the last couple of days- it is restarting by itself every now and then and starts to record.

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