Hearing Aids to avoid buying

This company manufactures the Phonak hearing aids. It must be the most expensive and wortless hearing aid on the market. Since I bought it I had only problems with it due to sweat corrosion. Tried to get it repaired even at the manufacturer Sonova AG without success. Now I am sitting with a useless hearing aid for over 4000 Euros. No wonder they only give a 1 year warranty. Next time better to buy a Chinese one for the fraction of this price with 4 year warranty.