Samsung - Fraud by service center

I have submitted my mobile galaxy j* on ** July due to hanging issue and hands-free jack problem. *st they told me to wait for approx * hrs but later on, they said there is a hardware issue in your device collect it on ** July. But on ** July they said there is a folder issue in your device and will get repaired till ** July. But when I called them on ** they said to collect the device on ** of July as the part available to us is not supporting on your device and we have ordered a new part which will come up to Monday and will get repaired up to Tuesday. After this due to all these postpone repairing of my device I have a complaint against them on Samsung customer care no. He makes a conference at the service centre and he said to repair my device as soon as possible. But later on about * pm the manager of service centre contact me and demands **** Rs for the repair and said it is the case of a water drop. On ** he demands **** Rs and now he is demanding ***** Rs approx. One more thing is that I submitted my device on ** July and on Samsung sites it is showing that the device is delivered to the customer and last is being submitted on *, **** for other issues
Bill no.-**********