Your bill is in order.Ask for refund for rental charged under One India Plan for Dec 8th to 31st. ( probably BSNL WILL CLAIM full Phone rental for Dec 2008)rent is charged for full month, even though BB Home500C+was activated on 8th Dec 2008.For Jan/Feb bill Phone rent will not be charged.( You cannot expect a Phone rent free service for Nov and part of Dec 2008). 2. Usage charges is in order.3. Left in doubt, only Rs 600/= advance .If you have another receipt to show thispayment, earlier ask for adjustment/credit in Jan/Feb bill.attaching photo copy of receipt in your application to A.O or CC.