Flipkart - NO RESOLUTION AND AGREESIVE VERBAL RESPONSE ON THE MISMATCH SERIAL NUMBER INVOICE CASE

I got in touch with flipkart for resolution regarding the missmatch of serial number in the product received and invoice generated , the case was logon sep ** **** , the deadline given was *th oct **** , i had a follow up with ** agents including some senior supervisors on the same , then the case was further pushed for **th oct **** , with regular followup from my end i managed the case to be highlighted to higher escalation desk and the response i received from the team was rude and without a proper solution and all the agents who called asked to send mail and could not wait for * minutes to check the same and was dropping the call while i was talking and requesting for further solution ,
i filed a complaint on NCH portal and the response was automated text from flipkart for the same , as if they dont know how to read english , I sent a mail to flipkarts grivence head on the same and misbehavior followed up by the senior agent in the company over call , and person named 'manish' from social media team called on **th oct **** at *:** pm and made up his own policy by saying he will not be helping me , and there will not be any resolution given to me after making me wait for ** days and all the agent till then telling that they will provide me with correct invoice with these non trustful deadline provided by the company ,For ** days these people have put the consumer in blackhole and have not shared any progress results and was abruptly shutdown the agents from telling the solutions , provided fake promises , increased mental violence , made non user friendly system of help center , abusive responses , unprofessional resolutions , violated the common ethics in front o NCH portals, disrespected government bodies and its legal complaints authority, aggressively mentioned that they will not be helping for the mistakes done by them .