problem regarding quick servicing

problem in pick up while over taking another vehicle, it takes time to increase speed i am using this car for 10 month in city. when 4 people sit in the car it do not pick up in up hill and two people should get down. i noticed warning sign in car and which shows pink ECG like pattern while driving and it disappear when speed is increased but comes when accelerator is released. when i asked about it in servicing center in Kathmandu they said some parts needs to be changed and they said you can ride the vehicle and when parts come we will inform you. in car catalog it is said that if it turns red then stop the car contact service center but it is pink which says that inform service center. another problem is when i put brake on long downhill it makes sound. now the problem is; service center said that some parts needs to be changed and they do not have the parts and it comes in 15 days. its been about 1.5 month it has not come yet and i am riding the car with that warning sign on. they said gear and brake parts needs to be changed so i am worried.