iPhone 17 Sound Repeats During Calls and App Use

I have been using an iPhone 17 since October 2026 and from the first day I bought the device I have been experiencing a serious sound problem that has never been resolved. While using navigation and YouTube Music, and also during WhatsApp use and regular phone calls, the sounds repeat themselves many times in an abnormal way. This situation disrupts both communication and daily use and makes the device very uncomfortable to use. Because of this issue, I have contacted Apple support many times and also took the device to service repeatedly. Each time I was told that it is probably a software error and that it might be fixed in maybe one month, maybe three months, maybe even one year, but they could not give a clear timeline. Despite the passage of time and several attempts to get support, the problem still continues exactly the same. I request that my device be repaired properly and definitively or, if this is not possible, that it be replaced with a fault‑free one. I would like this ongoing problem, which has existed since the day of purchase, to be taken seriously, examined in detail and resolved as soon as possible.