Sure.
Call your credit card company and tell them you want to initiate a charge back for this transaction.
Reason: Defective product.
They will ask you if you’ve contacted the seller about the problem and you’ll reply that you have multiple times and they have offered no resolution and they will not allow you to return the product.
They will ask you a bunch of questions regarding the transaction and at that point, they’ll give you a credit for the amount of the charge. They will contact the seller about the chargeback and the seller has 60 days to respond with a resolution. If they fail to resolve the problem the credit becomes permanent.
Of course, your intention is that they resolve it amicably.
Why would a vendor care about a chargeback? With enough chargebacks on their record, the payment processor will cancel their account and they will no longer be able to accept credit cards through them. That is your leverage.
And as I stated, they will be begging you to ship it back for a full refund and to remove the chargeback.
If you have any other questions, feel free to direct message me.
Regards,
Mark