Mivi — im complaining about the mivi ear duo pods

This company has a very bad marketing strategy through the youtube influencers. They sent me the duo pods and on the box of ear duo pods it is written noise cancellation but this feature does not work. They are not replacing as well as not even refunding the amount and telling it was a cash on delivery we dont give money but credits.
After a month they are returning the same product telling product is all fine.
And the customer service is worst. They dont even care to resolve the disputes