Advaith Motors — Advaith hyundai is charged cancellation charges eventhough i have cancelled before getting invoice for the cheque that have given

Address:	560045
Website:	www.advaithhyundai.com

I have done booking from Advaith vasanthnagar(grand i10) and withing 6 hrs of booking time, due to personal reasons i have done cancellation of booking.
When i book the car the sales guy walked in to my house and took my cheque, that point of time i don't know cancellation charges since he didn't give me receipt for the cheque. Next day early morning 8.30 AM he came to my house with receipt for the receipt, that time he given me invoice.But before that i have told him regarding my cancellation.
When i have done the cancellation of booking, the cheque was with Advaith so i have requested sale rep(Rakesh) from Vansanthnagar showroom not to deposit my cheque, he said your cheque will not be deposited they will tearit off but that day night i got the message saying that money was deducted from my account.
From that day(12 Dec) my bad days started and i keeps on requesting advaith showroom regarding refund of amount.Till today i didn't receive single reply from showroom.
Whenever i called to the sales person he always say that, you will get full amount as refund.
After 12 days of struggle from showroom today suddenly i have received the money in which they deducted 3000/- as cancellation.
This makes me so much disappointment after waiting this many number of days .
The worst part here is whenever i call sales-rep, he always say that you will get whole booking amount but advaith finally deducted my money.
I am not able to digest this situation.
Requesting you please help me in refund of my cancellation charges.