Defective goods

My very Geerten Sirs, I received yesterday my controller and my engine. Have the engine is installed, and wanted to test him and after 3min. themselves did nothing more. Earlier this year, 2x 30A regulator last month a 90A Regler.leider I must tell you that the product is mangelhat and yes it can not well be that I always just get defective stuff. Therefore I beg you to mfg opinion Udo