Voltas — Ac replacement ( parts not available)

Address:

bhuli basti , dhanbad , jharkhand

After too many complain, technician visited two times trying for many hours and finally took PCB for repair or replacement.After that they told me your a.c is out of warranty and pcb board is not available .
They promisd to replace my ac and they also charged me around 10 thousand rupees also .
After too many calls and visiting voltas ac service centre they finally gave me ac after 7 months . and it was complete a mental harrasment done by dhanbad service centre .
Till now they dont even gave me bill of that new ac,
It was really a horrible experience byuing a voltas ac .
i reqest to atleast do some needful acttion against them . and please ask them to give me the bill of that ac .
I dont know why they have taken that extra amount and also they charged me transportaion fees, installation fees,