Airtel — Charges me incorrect late fee

Address:

Gurugram

My due date used to be in 1st week around 5-7 day of every month. This time the due date was preponed to 28th may for the bill period ending 17th may. Last bill i paid was on 7th may 2020. Why is it so? I have missed the date and now they would charge late fee in next bill. Can it be considered for payment as before and no late fees to levied on my next bill.

Thanks,
Nitesh