Washing machine fualt bad technician

Technician came over for a machine that I'd about over a month old with less than 10 washes done. I explained over and over that the machine was working fine until it started having an issue with the drainage. I got a plumber to check my pipes there was nothing wrong he then decided to create a new drainage pipe outlet closer to the machine. The same issue continued. Their technician came over and insisted to me that it is this drainage fitting of mine which was made after I encountered this issue with the machine. Two grown men failed to understand this logic and left after 5 mins of doing nothing. I am beyond ****ed with the service recieved from Samsung for a 7000 machine