Since you paid for installments you should have got installments. However, I never understand why customers ask for installments as it slows the process down. As Pheelyks states even a relatively long paper will be completed in 4-5 days, something which takes longer if every single section has to be sent backwards and forwards first. For this reason I hardly every bid on installment jobs. You seem worried about having only 4 days to complete 5 sections, a good writer could do a whole 15/20k dissertation in this time so I would not worry about that.