generator keeps breaking

I purchased a Stramm 1kw generator a few months ago and it was working fine, then the capacitator and on/off switch broke, so i took it in for repairs and got it back 18 days later. I used it once after i got it back and the on/off switch was broken again. I phoned the lady at the store and she said the generator will be replaced for a new one. So i went to go fetch it and i used it that evening and all went well. The following day when i used it again it was already broken by the plug where you connect a cord for power to your home. I really dont find this right. Whats going on whith the Stramm brands. It seems to just break even tho its brand new.