avast cleanup still not working

why is after having purchased a cleanup license over 6 months ago,still avast still has not fixed cleanup not working.they are quick to take your money for a product that never works.i have used avast for years without any problem until now.come on avast you say you are fixing the problem but surely after 6 months it should be fixed

https://forum.avast.com/index.php?board=63.0