Can Builder deduct amount if I cancel booking

Hi, I recently booked a residential plot in Gaursons project in pre launch phase with 10% booking amount and application form duly signed by me. Now i am in a dilemma about going forward with this project. But when i look at application form there is a clause mentioning "If i prefer to cancel registration of the plot, after allotment of plot an amount of 15% of cost of plot will be forfeited". Recently i got a mail from Gaur on 25th May to collect the allotment letter for plot. I haven't collected the letter yet. So if i cancel it now will i be eligible to get my full booking amount or not.