Here's the situation,

My PSP was accidentally poured by soy sauce, so I rushed to lowyat to get repaired. The sounds sometime lagging and there was screen freeze sometimes. Then a week and half later my psp was repaired everything was alright until I brought to my house, and it was doing the same thing again except this time only the sounds that lagging. Then I repaired again coze it was still under warranty of 7 days, and today I took it back it was alright at the store but only several minutes checked because the guy insisted my psp was alright, but I got the feeling it was only temporarily. My fear was indeed true, when I was brought back the same thing happened again..sounds were lagging then it was off at all...what should I do? is there any repair center for psp that is trustable and reputable coze I didn't think the store was truthful..thanks guys