Get everything in writing and hopefully they stand behind it. Being an "offbrand" they are trying to make a name for themselves and become real competitors in the market, so i can only assume they will try to work with you.
It sucks when you get a machine with problems, Ive had it happen with many brands. Now is the time where you will see if they are a company you want to stick with.
Remember, they didnt, on purpose, put a machine out the door with issues. So give them the benefit of the doubt and see if they make right. If they do, then hopefully you tell everyone about your good experience.
If they decide to be jerks about it. Then certainly tell everyone about that too.