Idea Cellular — Sms issue

I am not able to send sms from idea cellular network though i m having balance in it...
I requested the customer care executive and made a complaint there, The customer care executive has directed to recharge worth rs 128(minimum) as per the protocol since June 2021. I was not informed about the company's new policy, now i wish to port to another network which initially requires to send sms to get the UPC.
Now, I would have to recharge worth rs 128 for sending just one message as after porting the recharge done by me will be in vain...
Please help me check out that as the new policy was not informed me.