Haldiram — Bad quality of haldiram rasgulla

I am writing this mail to whomsoever it may concern in order to lodge complaint about a product of haldiram's that was purchased from delhi (Shree shyam store) delhi 110059. The product was a container of haldiram's rasgulla that was purchased in the beginning of this month and upon opening the packet for consumption, the content inside had a very stale smell and also sour taste.
The batch no of the product is pbi13a