Sony India — Repairing for t3 set

Address:

Gorakhpur, Uttar Pradesh, 273001

Sir, I purchased T3 model 18 months ago.from last 2 months it used to switch off 3 t0 4 times daily.when i complained about this in the sevice centre they told me that the internal plate( fb ) of this set was damaged and they need to change it.I gave the set to them. From last 2 months they were telling me that the part to be changed was not available in the company so i demanded back my set . As soon as i demanded back within 24 hours they informed me that your set is ready.How this became possible so fast. I want to know which parts have been changed and its total cost. I have attached jobsheet with this complain. I need an urgent reply