Paying Guest — Charged unreasonable amount during this pandemic.

II was leaving in Mittal Niwas PG. It is in Gautam Nagar, New Delhi.
I came back to my hometown on 20th March. During this lockdown period my landlord said that she will take 4000 for April and May. I paid her the agreed amount of Rs 4000. But after paying the agreed amount she said that she will not take less then Rs 5000 for any month.
She again messages me on 30th May that she will take Rs 5000 for the month of June. She deducted the amount from my security deposit. After 15 days she said that since the lockdown is over now she will take Rs 10000 for the June. She even took Rs 10000 just for 6 days in July. She took Rs 2000 just for a single key. Actually I couriered key but it didn't delivered on time because that area was under containment zone.
She kept on changing the rent whenever she felt the need without any prior notice.