Airtel — not making calls for toll free where join is allowed for same no.

Address:

201005

I've taken 84 days plan with all calls free unlimited, but i've called to axis bank customer care, my all balance has been finished which i've recharged rs.50/-
Same number from jio are free.

Let me know pls what is the matter? Revert my balance immediately, since, i've already taken 84 days plan with all free calls. Where is my balance deducted and why??