Dabur — Less quantity in a sachet

Dear Dabur,
I bought a bigger packet of hajmola chat cola, which contains 20 packets inside. But when I opened the packet I got to know that 8 out of the 20 packets contained just 2 units instead of 4. I think it is a big fault of the company and the issue needs to be resolved as soon as possible because fault in 8 packets is not very rare but can be happened with many of the customers.
Please take care of your products.