Bosch washing machine

I am writing this with a heavy heart. Ever since I bought Bosch washing machine model WAT2848XZA/54, i only enjoyed it for few months within the past 3 years. The machine destroyed 80% if not 90% of my clothes. It leaves brown permanent stains like Rust. I lost a count of How many times i reported this. The technicians came with Bosch cleaner or Descaler but the stains are still there. They changed drums more than 3 times but after few months i experience the same problem. I'm tired of washing with my hands while i have an expensive machine . I only use machine for Dark clothes but most of our clothes are bright but i can't wash them in the machine. Im tired of buying new clothes because others are full of stains. I bought your machine because it was highly recommended but now i regret. I can't afford to buy another machine within 3 years. This machine should have last me more than that but i started experiencing this within months until the last year of quarantee. This is not how it was supposed to be. May you please solve this because i can't take it anymore . You will be shocked if you could see the amount of clothes destroyed by this. your technician don't know what causes this. they changed drums but it comes back again after few months.