USB C charging?

Hello, I have bought the
CHUWI UBook Touchscreen Tablet, 11.6’’ FHD (1920x1080) IPS Display, Windows 10 Home, 8GB LPDDR4, 256G SSD, 4K Video Decoding, Intel Gemini-Lake N4120 Processor (Up to 2.6GHZ)
which I am loving but I cannot get it to charge on usb c which was one of the reasons I bought it, can anyone please advise how I get to do this or have I got a faulty one ?