Jaquar — Leakage in flushing system

I am facing leakage problem in Jaquar flushing system. They are saying there is leakage due to dust. What jaquar is expecting that our tank should be completely dust free. They suggest me to have an inline filter in my tank, that will resolve the problem. Why don't they make it compulsory to sale jaquar to only those who have inline filter. While selling they made 100 promise and when it comes to service, thye have horrible services. My problem is pending with them for almost 8 months now.
Worst services from Jaquar.