there was 2 fuses, I tested the amp with 1 fuse and then the other, i didn't check them with a multimeter. anyway who cares the amp is gone
That's the point though... you swapped fuses, but didn't "check" the fuses, and shipped the amp back. Look man, nobody here is busting on you. That doesn't seem like a normal response from someone who is familiar with tube amps, and if you've owned one for years, the response shouldn't surprise you.
If you've owned a tube amp for years, what would your response to someone who on their first post says "my amp doesn't work," second post after being asked if you CHECKED the fuses, you replied "I swapped the fuses but that didn't work" and third post "no I didn't check them but I returned the amp anyway."
That "sounds" like someone new to tubes, to me. I don't go as far as buying an amp without a lot of forethought into what it sounds like and what tones I want/need and without a lot of feedback on these things. To buy a tube amp, and ship it back without checking fuses and tubes, "seems" like something a newer player or new to tube amps player might do. This is not an insult though. If you've played tube amps for years, you know that.
Plus, you didn't say "I returned it and they are shipping me a new one" or anything, just that you returned it. Did you give up on trying an MT15? Didn't give us much to work with... If you have another one on the way, please let us know when you get it. Don't know what you like or play, but if you bought that amp, you knew what you were getting so you'll really dig that amp.