Good morning

I have a volvo s60 that I'm having a couple of problems with. I'm hoping some one with ore knowledge/expertise than me can help with.

It's a 2015 D4 S60, there is some sort of electrical gremlin either causing the battery to drain or not letting it charge.

The battery was replaced when we got it and when i first had these issues I was told it needed plugging in and the car being told it had a new battery. This seemed to resolve the issues, stop start started working again etc,
but now 2 months on I'm back in the same boat.

Stop/Start doesn't work, infotaintment shuts itself down when the engine is off due to low charge and I get a battery low warning on the screen.

I dont know if it's related or not but I have a stop light malfunction warning on for what is now a new bulb. For some reason the car appears to be turning off the voltage to the bulb. It has worked twice since it first went but only for short periods.

Has anyone had any of these before?

Thanks in advance