Xperia XZ Charging

My Xperia XZ is not properly charging. It started by having a dim light on the torch light whenever connected to a charger and would charge at a slow pace when switched on whilst charging; if its switched of it would still have the dim light. Now, it is not showing the charging light if it is off whencharging and also not showing the battery percentage, only showing a lightining bolt and the charging battery. If you switch it on the battery percentage remains on 20% when charhging and does not change battery percentage upon long time use.