Sansui India — Machine is not working properly and vibrates

Sir/Madam
I have purchased online washing machine of J series of Sansui Company through flipkart app. It's not
working properly it vibrates too much. Technician visited the house on 15.10.2020 and told me that it's a manufacturing defect and he has sent the email to the
company. But still no response from your side. If there is manufacturing
defect in the machine so it could be replaced or repaired.
I am regularly calling the Sansui customer care but they always say wait for 24 hours. Almost 10 days have gone but no positive response from company. Neither flipkart helping me nor Sansui
So please help me in this matter