Aerofit — Treadmill service never done properly

Address:

Hyderabad

I have brought a treadmill from aerofit
Since I brought the machine I have been serving every month because some or the other problems arise
Now is the situation I am out of the warranty and they started charging me the money
And even after I paid them I have the same problem which is not fixed
I don't understand what's going on and who is the correct person who can fix this
Either they fix it or replace the machine.