WiFi and Ring Pro Power Decreases

Since the day I bought my Ring pro, ( a year ago) the device kept facing voltage decreases, the audio quality was very poor and the results, disappointing. I invested 240€ extras, in order to provide Ring Pro, the best power (voltage 16v/40VA) and Wi-Fi network environment. The extra money was spent in order to avoid any technical issues from my side and in order to enhance the entire system (Voltage and Wi-Fi). I sent a detailed report regarding the technical issue and my finding, about the WiFi and the power decreases, they didn’t respond. I am wondering if anyone else is facing the same issue. I have noticed that if I disconnect my ring pro from the WiFi network , the power voltage increases , once I connect it back to WiFi the voltage at my ring pro decreases again. As a result, I am facing sound quality issues again.