Urban Company — Charged for parts replacement but only cleaning done

Urban company is a gang of cheaters. I used their chimney repair service. The technician took the motor for rewinding, billed for shaft and bearing replacement but actually did nothing except cleaning. Charged Rs 2500/-
Problem repeated within one month. When Called for within warranty repair, he told me that now this is a new problem and blower is broken.
I was not convinced with his arguments and called the other local technician. He dismantled everything in front of me and I was shocked to see that the blower was perfectly alright and only cleaning work was done where as billing was done for shaft and bearing replacement. I sent all the images to urban company but till today no response.
I want my money back.