[Resolved]  DLF Delhi — Double booking for same unit

I live in the USA. I booked an apartment at Panchkula phase II directly through an assistant marketing manager of DLF Delhi in Aug 2010 for which I paid the required booking amount by cheque. DLF confirmed the booking and advised me the unit number and other details through an email. After this I did not get any further information regarding application process in spite of my repeated efforts both by phone and email messages.
Finally after much effort I managed to get in touch with DLF Chandigarh office end of last year and was advised that there was no booking in my name and the unit number which DLF had conveyed to me had actually been allotted to some other person. This ofcourse came as a big surprise to me as I was under the impression that I was dealing with one of the biggest Real Estate companies in the country and did not expect such unethical behaviour.

After living in the USA for the last 24 years, I was planning to return to India and live during my retirement. However, with this bad experience I wonder if it is worth doing so, where such unethical practices are followed.
My letter to the Chairman of DLF which was sent by courier was not acknowledged as well.