Ariston vrot geysers

In Ausgust 2022 we had a Ariston 200L Class B geyser fitted. After 2 years the water colored yellow and brown due to the rust in the geyser. It is now 3 years old and the water is leaking through the back of the geyser totally vrot. I have seen other geysers from another make lasting more than 20 years. This is the worst quality in my experience.