Charging HI 10 Air

Just purchased this tablet. Having problems charging it. Have tried overnight both powered on and off. The discharge rate greatly exceeds the charge rate when it is turned on. Has anyone had good luck with another charger? It seems to constantly switch between battery and AC power when charging while on. The USB-C cord is not very tight in the port. Should it be?

The problem is the port. The USB C connector must enter deeply so that it makes good contact and the screening process is constant.
Check that there is nothing that makes contact difficult and tries to get inside