Nexa — baleno delta model petrol

Address:

Surat, Gujarat, 395009

car : delta petrol
i got delivery of baleno on january 2017.
Usage of my car is approx 5000km.

I have bad experience of baleno car
Which are as below:
(1) water ingress in left side of tail light and short circuit occured.
(2) front jumper was damaged as no
Accident occured till date. May be quality of jumper is not good.
(3) most serious issue: when i run my
Car on express highway (Ahmedabad to vadodara express highway) around 90km/h speed, speed suddenly gradually reduced from 90km/h to 40km/h eventhough accelerator is fully pressed.
Please look into the matter.
i want to check above problem from
Expert showroom as existing maruti workshop is not as good as premium. Workshops are not for premium cars.
please do the needful.