People's experience with Mackie MC - 450s and faults? I've had a nightmare

So I bought my Mackies back in October last year, then in march 5 months later the left side developed a fault where it admited a static like noise at certain frequencies. I got a replacement failry quickly, and now yet again 5 months later BOOM similar fault this time in the right ear certain frequencies and electrical buzzing noise. It seems like a really poor experience and with a 1 year warranty… I am very concerned… I’ve never had problems with my old DT 990s bar them going faulty 3 years in, my OPPO PM3s still work perfectly fine. I have them plugged into a schiit vali 2 on low gain pair with a bifrost multibit.

How has everyone elses’ experience been. At this point I want a refund or a new full year warranty with the next replacement…