Got alarms on my M3 3rd gen. Charging system malfunction. I already changed new battery and alternator but still i got those errors on my dash and infotainment screen. What should i do next?

 

I would maybe consider to check if your ECU is at fault.
Why did you change the battery and alternator. Did you verify they were bad? Have you verified that the new alternator is function correctly? You may also want to double check your NEW battery as well by load testing it or having it load tested?
The Mazda ECU has the regulator built into it instead of the inside the Alternator, so it can more quickly take into account things like extra loads from fans which it is controlling.