Water purifying System using a lot more filters than advertised

Purifying System not working as advertised and explained over the phone . I bought two 3 Stage 20Inch Big Blue Filtration Unit with 55watt UV Sterilizer I spend about R9500 to purchase these animations R9000 for installation The water stayed brownish and I contacted Johan after 3 weeks After checking the filters were covered in mud Yes the system is working but I am in Oudtshoorn and spent this money based on filters to last 6 months at least per advert on Facebook Not bargaining on changing 6 filters every 3 weeks I still cannot use this brown water to even wash clothing .I only use about 1500 liters per day I cannot spend R1100 every 3 weeks for filters Johan told me if I post anything negative about his products his lawyers will contact me on Monday