VAT applicability for EOU's

Hello!

We are an 100 % EOU company. Whether we can procure the rawmaterials, consumables, etc, with out paying the any taxes. (since we are an eou we are exempted) whereas our DCTO is pressuring to pay the tax and procure the materials and finally we have to apply for reimbursement.( it is too difficult getting refund from ST). Somebody can suggest which is the legal way?