Airtel — 4g swapping not working

I tried to swap my 3g sim to 4g by sending sms to 121, but accidentally sent wrong sim number. (Sent 19 digit no. Instead of 20), and then confirmed the submission as i didn't notice the mistake. Still i got sms saying that sim will be activated shortly, but i doubt it will - as i have sent incorrect no.
Now i am hoping the system will detect wrong number and cancel my request. But i haven't got any reply after that and my old sim is still working (Been 10 hours).
I even tried to cancel it myself by sending nsim to 51619, but that request is still pending too..
What should i do