Don't buy Tata cars

Before buying many told Tata has bad service, I bought to support Make in India but after one year I feel it's a very bad choice. There are rust issues, battery drained soon and roadside assistance was worst waited for 5 hours every time I call RSA they tell 10 min a mechanic will be arriving but after multiple calls no response. Very bad service. The mileage shown on display is misleading it shows 20 - 25 on the highway but actually, it's 15 km/l. Gear is very hard as you use.