Urgent Complaint: Oppo A38 Faulty Speaker and Ticketing Failure

I'm writing to address the poor service from Oppo South Africa regarding multiple tickets I've submitted for my faulty Oppo A38 smartphone. Despite providing detailed descriptions, I've received no follow-up. This neglect is especially troubling given the well-known speaker issue with the Oppo A38. The repetitive inquiries during follow-up calls add to the frustration. I request prompt resolution of my tickets and transparency regarding steps to address the speaker problem.