Flipkart — Didn't get soft copy of invoice

I have purchased a bed from flipkart with order id OD[protected]. It was delivered on 13th September and installed on 19th September. Generally an option to download invoice comes within 24 hrs of product delivery. In my case till now there is no option available to download invoice. And worst part is, there is no option available to contact flipkart customer care also for my grievances other than stupid chat bot. I have tried so many times to contact flipkart customer care through chat bot but unable to connect. Kindly look into this matter and do the needful asap.