My s9 battery is draining quickly after I updated the new software version.Need help and support.

How to get rid of this

So popup adds are coming. How to remove.

Dear Samsung I and many others pre booked s9 and got the price 3099 aed,within a month price has dropped drastically. will samsung going to reimburse or give some benefits to it's customers to compensate this loss.

battery is draining quickly any suggestions