Central Board Of Secondary Education [CBSE] — cbse revaluation process

I just want to raised the voice against cbse revaluation process.in this process a student have to pay a high amount of money for revaluation. Intially student have to pay rs.500, then rs.700 and later rs.100 per question and if correction or changes had been founded so it was the invigilators mistake but the expenses are paid by the student so why should a student take the burden of it. So i request the concerned authority that if the number of the student has been increases then he/she get refund of his money.

Thank you!!