The government had given a three-month window to get rid of the existing stock.
Neville Noronha, managing director of D-Mart said the ban is unfair in commodities such as fresh produce, staples etc which are loosely sold.
"If manufacturers can package the product with plastic, we also should be allowed to package products at shop floor," he said.
However, he welcomed banning of plastic carry bags.
For first-time offenders, the fine will be Rs 5,000. For second-time offenders, the fine will be Rs 10,000. Those who violate it for the third time will face a fine of Rs 25,000 along with imprisonment of three months.
Customers have to brace for higher prices because of alternative options, Biyani said.