Muthoot — Gold loan scheme change

Dear Team,
I have received the top-up facility on my existing gold loan today but by mistake i have selected wrong scheme which is highest scheme and now the interest rate is very high . please help to cancel the scheme and help to go back on previous scheme. i did contact the branch but i was suggested to pay interest charges and processing fee which is very high for a day. i have attached the document for consideration.
I am an old customer of Muthoot, please ignore my mistake, interest charges.
Very urgent.
Regards