Hey Shaik,
You're not alone on this. I endured this nightmare for 4 months O__O Don't mean to scare you on this but those buggers are hard to kill once they get comfortable around your house or in your kitty's fur.
Frontline didn't work for me. Try getting Advantage. It's a few RM cheaper but works better than Frontline. They come in a small tubes. It's about RM12-15 each or RM47-RM50 per box of 4 (depending on the shop). What you do is you squeeze the entire content onto the back of your kitty's neck, where kitty can't reach of it tried to lick. Leave it there.
In the next 24 hours, the fleas will get dizzy and die. The chemical will spread on your kitty's fur and skin so any contact will cause the fleas to die. This will last for a month. You can also use a flea comb to remove all the dead fleas from kitty's fur.
Meanwhile, I suggest you clean your house. If your kitty's been on your furniture and beds, wash the sheets immediately and vacuum all your carpets/floors/rugs. Fleas love places like that and they will lay eggs all over your house! That's why you need to vacuum and mop your floors with bleach/dettol.
I know this sounds extreme but this is the only way you can break the flea's life cycle and stop them from their continuous breeding. If necessary, use a 2nd dose of Advantage one month later for maintenance.
Good luck