Landlord Harassment — my owner is asking for the painting amount, as i am leaving his house staying five months

Address:

Plot No. 231, Flat No. 3, Vivekananda Nagar, Allapur Road, Near Leaf hospitals, Borabanda, Hyderabad, Andhra Pradesh, 500018

My house owner is now asking me to pay the rent for another extra month rent for april to may 2019. However, i have paid him the advance money for the same of rs10, 000/- at january 2019 and the rent for the month. Apart from this, he is asking me to pay 50% of the painting cost he invested, which is another rs10, 000/-. I have the proof in whatsapp asking for the same amount. Let me know what to do in this case?