BSNL Prepaid Mobile — unable to unsubscribe from the voice services

Respected Sir/Madam,
I,Nanduru Mallikharjuna Rao,am a customer of BSNL prepaid mobile services bearing the number [protected].Sorry that i am unable to provide the exact dates in this complaint.My complaint is that last year in the month of december(I am unable to recollect the exact date somewhere around 1st 2 weeks i received a sms from the voice services 12555 regarding one LEARN ENGLISH pack for which we called the number and subscribed the pack for which Rs20/-was deducted from our balance, but the same day felt the need to unsubscribe it and called the bsnl customer care for its help in unsubscribing it for which we were guided to send an sms by typing in CAN LEARN ENGLISH to 12555.we did the same but with no result.This month on[protected] when i recharged my account it automatically got deducted off Rs20/- from my account.I called up customer care for their assistance and they provided me with different versions.1)the first person asked me for the number from which the sms was forwarded to my number and i mentioned that this time in the sender's field it was present as ONMOBILE but no number can be elicited.He took my complaint and said that he will forward it and it will be rectified in 24 hrs.2)i checked out that the number from which i first received the sms was from 12555 and called the customer care for the second time for which she checked the data base and asked me to call 1255530 and follow the instructions to unsubscribe the pack.I did the same and the result was that the ivrs service declared that i wasnt subscribed to any of the packs.for this the call charges was 30ps /min.3)the third time i called up the customer care to convey the same message and this time he asked me to call 1255580 and i did the same,but this time the call charges were Rs5/min,i called the number twice so that it can be of any help but i had to part with RS 50 nearly for all this hopeless venture without any result.4) for the 4th time when i called up the customer care to decide whether it was upto their reach /not finally the answer was to go to the nearest BSNL office and try for the solution.
this is all my anguish that as a customer i have faced for subscribing the voice service accidentally and left with no solution to unsubscribe it rather than parting my money every month for the service which i am no longer or have ever used.
Please provide me your help and suggestions in this regard so that i can retrieve my money back or atleast be saved from departing Rs20/- every month from my account.
yours faithfully,
N Mallikharjuna Rao.
[protected]
[protected]
VISAKHAPATNAM