Exchange of purchase goods is not eligible for exchange or return in any condition because coal is mining product and niche goods.
However kindly check all description of goods on physically or verify before order place.
REFUND/DEDUCTION
If your goods is eligible for deduction when goods not dispatched according to product description provided by website or mismatch of goods order by you .
DEDUCTION
The deduction amount consider as per GCV range decrease and percentage ratio decrease , if client claim deduction then have to submit lab test report of third party analysis for proof goods and not satisfactory delivered.