Dell Studio 15 Laptop — Difference in order recieved.

I purchased a DELL Studio 15 laptop on 24 October. I received a dell studio laptop which was not of the configuration that i paid for. when i raised a complaint regarding this on November 2 they told me ill be getting my laptop back by Nov 17th latest or refund of the money by same date and in the mean time I can re-order my laptop again so that I can receive the same before Nov 17.
Till November 24 no one from dell has collected the laptop. I have been in constant touch with Ms Pinto Renilda(sales person) and her manager Pooja Jain.

On November 24 I blasted Saurabh (Filling in for Pooja Jain in her absence from office) for the dealy that was being caused and asked him to pay me compensation for the mistake done by Dell.
Even after telling them that i had some urgent work to be done on the laptop by December 15th, my problems didnt mean anything for them.
Now on Nov 26 a person has collected the laptop from my place and they tell me that a new one will be delivered by 5th December.

Now i have taken a personal loan from Axis bank to buy this laptop and who will pay the interest for these 7 weeks of delay caused by Dell.
Secondly ill have to finish my work in ten days to meet my deadline on Dec 15. the work i had planned for 6 weeks has to be done in ten days. how can this be possible? when asked for the compensation of 5000 bucks for the stress, mental agony, harassment and the physical pain that ill have to take now to finish my job in ten days, they say they wont be doing that.

whats the point in advertising and spending so much to build brand when the service provided fro DELL is so very pathetically hapless?
Any one facing the same problem; please guide me on how to proceed with the tribunal.