ah... the joys of rebonding...
You will need to use some serum and proper conditioner for a bit until your hair sorta relaxes...
Right now it has been pulled very very loose by extending the hair cuticle. It basically is like perming only instead of rollers to curl and shape the hair strands they iron it straight. For the first 2-3 days or so you should refrain from washing your hair. At least let the chemicals do their job. The salon would have washed most of the stuff off but what's inside the hair cuticle needs time to work.
After that you need to upkeep the condition of your nice, smooth, straight hair. Some shampoos like Redken Smooth Down series is made specially for rebonded hair. This range actively stops the frizz and keeps hair from drying up as some bad rebonding does. (Oh! I've had bad ones before... looks smooth today but one week later your hair is dry like twigs in a dessert). Also, you will have to consider doing treatments.This is vital as it pumps in moisture to your already fried straight hair. Moisture adds weight to keep it straight. If you don't want to go to a salon for it then you can try some home treatements. Redken's All Soft Heavy Cream is good. Senscience Inner Restore treatement is also good. If you want stuff you can find at guardians and watsons you can try. Loreal Elseve(the see thru beige bottle can't remember the name of the range) . Other stuff like pantene and sunsilk don't really help much, at least for me. Doing the VO5 hair hot oil treatments are okay too but can get a bit messy if you are not used to it. Shampoo then apply whatever it is to your hair, cover it with a showercap and wonder around the house for 30+ minutes. Answer emails, watch TV, eat some food... up to you. Then go rinse it off. Do this at least once a week.
It's not that the regular stuff doesn't work but the results are not as effective as the salon brands. If you don't take care of rebonded hair it might frizz up bad and wont disappear till you cut it off. Lost some nice hair due to negligence before -.- It pays to go the extra mile.

last time my fren do for RM138 plus haircut,ok ah?

depends on his hair lenght la.. But i hear most cheap priced rebonding, the saloon uses cheap chemicals which might damage the hair after a few weeks..