HUL — RO water purifier

I have pureit ultima RO and got its gkk2 changed on 13 Feb, 2022 for Rs 3900. After 2 days it started showing change gkk1 and gkk2 and RO got turned off . When I contacted service centre they told me to replace circuit board. How is it possible that immediately after changing gkk2 it's circuit board also got damaged. Before changing gkk2 I was not facing any issue. Immediately after changing gkk2, i started facing all these problems. Last year my friend also faced the same issue. This can't be coincidence. What's the use of purchasing branded product. Rather i would have gone for some local company. HUL is playing with the customers. Moreover the price of circuit board is Rs5500. Why the hell I will spend Rs 10k on its repair if other new Ro is available at same cost . Purchasing this product is mistake.Better not to waste money on it. It's a mistake to purchase pureit.