Aquaguard r.o. water purifier
No response even after four complaints registered

I purchased a Aquaguard water purifier on third august . the sales person supplied and installed the product next day but there after my three month inspection and check is still due no body contacted even after three reminders. Now the R.O. machine is jammed since 20th january I am complaining every day, they take the complaint and ask all relevent questions but no service person has contacted me so for.