Landlord not returning deposit money

We have paid Rs.3,00,000/- as deposit money, for a lease period of 11 months from June 2018 to May 2019 at a rent of Rs.20,000/-, we have extended and landlord also didnt provide revised agreemnt in july 2019 landlord told that he would increase 10% rent which we didnt agree, we told that we would remain for the same rent which landlord didnt deny, on 29th July 2019 we decided to vacate and informed through whatsapp and over phone, on 15th Aug we informed that we would vacate on or before 15th sep 2019 and we bought a new house and moved there peacefully, We have handed over the keys on 15th Sep 2019 to his friend as per landlord suggestion. we informed and stopped rent for Aug 2019, Landlord agreed to it and for landlord agreed count of days in Sep 2019 rent would get deducted. on 17th sep 2019 landlord inspected house and happy about keeping the premises clean, I have showcased few minor damages as well that occured and costed Rs.5000/- agreed for that. Earlier agreed with landlord as Rs.20000 (aug rent) + Rs.10000 (sep 15 days rent + Rs.5000 damage + Maintenance + EB charges Now Landlord needs full month rent thats Rs.10000/- extra as per above agreed. Landlord is asking to pay the aug rent+ sep rent + eb charges then he would provide advance refund cheque, How should i proceed peacefully in this scenario