Bharat Sanchar Nigam [BSNL] — Porting message blocked

The bsnl has blocked my messages to 1900 . I wanted to port my one of sim to another so i send port message to 1900 the message showed an error so i tried 10-12 times then i contacted customer care firstly they said server error try after 24 hours and after that they said to recharge of 147 rs to send the message they said till you dont recharge 147 plan your message will not be send to trai.i already have a working plan with validity till 2022 .and main account balance for sending service message to 1900.Why should i recharge with 147 just to send one message? Please take this issue as a a manipulated loot by bsnl and take disciplinary actions against them, there is so many customers facing this issue .