Sennheiser Momentum True Wireless 4 Right Earbud Has No Sound

I purchased a pair of Sennheiser Momentum True Wireless 4 earbuds through Hepsiburada. For approximately one month, I have been unable to hear any sound from the right earbud, rendering the product unusable.

I have tried to obtain support from Hepsiburada and through the relevant referral channels, but no clear action has been taken to resolve the issue so far. I did not expect a product from a brand like Sennheiser to develop a fault so quickly.

I request that the issue with my defective earbuds be resolved promptly through whichever option is deemed appropriate, whether repair, a like-for-like replacement, or a full refund. I expect this matter to be addressed quickly and my grievance to be resolved.