I hope you have a licensed real estate agent help you on this. Commercial transaction often includes conditions such as financing, free of environmental issue, free of health and safety issue. Commercial takes longer for Mortgage to approve because most lender will need those said issue addressed to get the best rate. When unable to secure Mortgage for the lower/best rate there are other lenders who will finance the loan but at a higher borrowing cost. With those guys, their requirement will be lax and easier to be approved.
I never seen a firmed offer on a commercial purchase, but I have not seen a commercial transaction without a licensed real estate agent. Question like this is best referred to that person.
I can tell you this, if it's a residential purchase and you firmed up the deal to secure the bid; most likely you've waived your financial condition. If so, then all deposits made have a chance of losing and the sellers can take you to court to get the rest through the court system. Rarely comes to that because your real estate agent will protect you through their own errors&omission insurance. I'm a licensed Mortgage agent. PM if you are in trouble
But since you are buying from the developer; I hope you read the agreement you've signed on. Read it again and you can find the options available to you. That is a problem when buying from developers but the advantage is that you are buying something that will be worth far more than your purchase. In your case, read your documents or speak to real estate agent if they can help. That's what they are for anyways