Tek Care India Pvt. Ltd. — electrolux microwave part taken away and not deliver for 2 months

Address:

Thane, Maharashtra, 400601

I had purchased electrolux microwave and registered a complaint with tek care india pvt. Ltd. For faulty display on 22nd sept 2018. They sent a guy named anwar shaikh on 25th sept who removed the display component claiming he would fix it and get it back within 2 days. Even after insisting that get the new component and fix it at home, he removed the display and took it with him without giving us any receipt of it. After numerous calls, which they hardly picked up, and many times they used to disconnect the call. I called up their customer care number 39404040 where the dumb customer care agent used to say your complaint id has been closed. How could they simply close the complaint without customer's consent when customer has not received the part back?
On few calls which they accepted they used to give lame excuses like "your component is under observation as it's been fixed." few days later when called they said "it's not yet done as we haven't received the component from company to fix your display." basically all their replies were so contradictory making me wonder if they have sold our original component. This has been going on for nearly 2 months and i am still awaiting them to return my display component without which we can not operate the microwave.

Complaint ids : mum [protected] and mum [protected]
Service center no : [protected]
Customer care no : 39404040