[Resolved]  Airtel — regarding tariff for call reduction price

dear sir,
i am a prepaid customer for airtel . my mobile no is [protected]. i got a recharge of rs. 47 which would reduce my STD rates to rs . 0.75 . after that i got another recharge of rs.27 which would decrease my local rates to rs. 0.60 . now once the sencond rechagre was done the first rechagre for STD rates is nullified and i loose my money. i also had a talk with airtel customer care and didnot get any reply. i think this is unfair means and they are fooling the customers . there can only bet two conditions
1. once one tariff reduction plan is taken the next one cannont be taken unless first expires in given time
OR
2. the company intimates the customer by SMS or any means that he will loose its first plan if he goes for any other before due date . and then the recharge should be allowed ..

i took the pain to write this as io think millions of customers are being fooled by this faulty practice ...plz look into this