Spotlight Cam Plus Plug-In not working

I've a brand new Spotlight Cam Plus that commes with a long USB-C lead attached to an adaptor and a UK 3 pin plug. Very quickly the cam lost power, the supplied USB-C lead would not charge my phone when tested but the cam did work when I attached it to a very short USB-C tablet charger. Ring supplied a new USB-C lead and adaptor and that worked for all of one day. No matter how many times I unplug/replug the USB-C supplied lead there is no sign of any life in the cam. When I take it inside and connect it to the 30cm tablet charger, the little blue light comes one and the cam works, but is of no use inside on a 30cm lead. Any advice would be appreciated, currently tempted to ask Ring for a return.