Sri Chaitanya Techno School — Refund the admission fees

Dear sir/ madam, I approached the school ( Sri Chaitanya tech school madhavaram)for admission for my children 4th and 6th STD respectively.. conversation from State board to cbse board.. at the time of admission I brought my children for writing the entrence exam and they got selected by the management and I have been asked to pay 12000 at the beginning saying 1000 as application fee and 5000 will be the admission fee with the concession of 25000 that too expires today Like that.. I told them I have only 5000 now so I will pay the remaining amount at the time of admission but they didn't accept and forced me to pay 12000 at that spot.. so I paid the amount without consulting my husband..when I got to know I won't be able to pay fees for both of my children for the upcoming years I requested them refund my admission fee explaining my situation.. but they denied to accept they are telling that admission fee not refundable we have told at the time of admission incase if tution fee paid we might have considered the issue and made arrangements for refund.. I was not much aware about that.. because I got to know other school are returning the admission fee when parents are unable to proceed admission with them.. in the receipt which I have signed it is mentioned that " once paid the amount will not be refundable " but no where it is mentioned the admission fees not refundable.. we are not rich enough to admit 2 children in cbse school..so ple consider my situation and refund my amount..
Thanks