Bikanervala / Bikano — spoiled rasgulla

I purchase a spunch rasgulla 1.25kg pack of bikano and when i opem the container a gas leak sound came n when i eat it feels they are spoiled and a bitter taste came... I made a complaint on 22june n its been almost a month n still i didnt get the replaced product... Batch no b3aja
Date of expiry nov 2020