Apa brake pads wo until that price for front brakes only? U kena potong liao. 

Skimming price RM90? Better add on money to get a brand new set of front rotors. It's not worth skimming.

Water leaking into car cabin? Which part?

No name brand from Kepong is it? Waste of money bro.
Where u buy it from? 

Better get other brand like FBK or Trestor. Cheap cheap sub RM100 pads

Bosch brake rotors are about RM150 ~ RM200 per front set. I see that the same seller (airline) also sells Bosch brake rotors for RM180 for the Persona. If muslayer is around, maybe you can contact him to get those Brembo rotors for RM140 only from his spare parts shop. I've done brake rotors skimming before for about RM70. Not really worth it as it solved the uneven surface of the rotors for a while only before it came back, plus it's thinner now.

For the leaking issue, have you checked the weather sheet for your doors? They need to be stuck onto the door well to prevent water from coming in. If they are, maybe the source is the clip's hole, which you can solve by pushing and sticking some book cover plastic or something around the hole that the door panel's clips goes through. I did that quite long ago and till this date I haven't detect any water leakage into the car, although it my be because the amount is smaller now and that they're being absorbed completely by the soundproofing material on the door's panel.

Survey first and get ur options right. This mekanik just wanna cekik u only.

He wan u to TRUST him only isit? Mayb u can find TRW brake pads...currently using for my front and rear...so far so good...slightly better braking than stock yet lesser brake dust

dafuq proton.. broken a clip behind the fuel door which appears to be a spring... now fuel door stucked..    this thing got replacement ga?

Oh my mama..replace here and there,macam I print duit..lol