Sir there is a distributor of Turtle and F1 products at plaza, near the PSO petrol pump, the harder the wax, the better.
Both Turtle and F1 are good and best value for money as long as they are applied and removed nicely (just do not make a too rich or lean coat and apply in circular motion).
You can get the Chinese made P21S for 1,500 Rs, still good for money spent, will last for 4-6 months usually.
Also prepare the car for waxing where there is minimum dust.
Word of advise, you can use the RoyalShield, it will remain good for 3 years easily even if you park your car at a place with direct exposure to sunlight, rain or dust.