Recurring issues with the RO water filter

I purchased a water filter (RO system) from the company 'Faber' on 17/08/2025 [sic]. It was installed in November, functioned for two months, and then broke down. Since then, it has malfunctioned 5 to 6 times. The product comes with an 18-month warranty. The company provides only temporary fixes, and the unit keeps breaking down repeatedly. I have requested a replacement, but the company refuses to listen; they only offer to replace individual parts, which is not a permanent solution. I have been struggling with this for a long time and feel harassed by the company, as my issue remains unresolved. I would like to initiate legal action against the company. I demand either a replacement product or a full refund. Thank you.