Bosch Home India — Refrigerator service genuinity

I have a two door fridge of Bosch purchased in 2016.The bottom fridger door was not closing properly hence we comlained on 19 may. Technicialn visited and adjusted the gasket. Cleaned the motor and compressor behind the fridge as he said it is getting heated up.
Complain number[protected].
There was no process of identifing authenticity of the bosch service provider nor did we get any receipt from bosvh for Rs 800/- service charge. Even no feedback call from Bosch which should be must
After that we found that the ice is not forming in the fridger. So we lodged complaint again. Same person visited and said gas is chocked up and after twodays he sent two persons who did some work. But now the entire fridge is not working.
We are very much apprehensive about genuinity of service providers. Also we want to pay to Bosch certified mode with a receipt. Why should we pay to the service provider on his google pay ?