Forfeit for booking amount for Property Upgrade with the same builder

Hi, 2 years back I had booked a 1 BHK apartment at Palava City, Dombivli, Mumbai. Builder is LODHA. I have made around 95% of the payments. As per a latest update from builder they will give me the possession around Oct 2018 and at that time I will have to pay the balance payment. 1 week back they contacted me with an upgrade offer to a 2 BHK apartment. After some deliberation I agreed and paid a booking amount of Rs 1.26 lakhs. I was planning to withdraw some money from my PF account. However next day I came to know from my company's finance dept that I will not able to withdraw the said amount from my PF. So immediately I called up the sales executive of LODHA and asked him to cancel my booking. I then asked them to adjust the amount against my existing 1 BHK apart. However they are refusing to do so and forfeiting the booking amount. At the time of the booking I had signed on a two page printout which had a break up of the 2 BHK cost, however there was not explicit cancellation clause mentioned there. My query is since this was an upgrade offer can they forfeit the booking amount the full booking amount. Regards Piyush Sukumaran