Landlord harrassment, taking advantage

Hi, I have rented an office for which, we were not able to pay rent properly after certain months. 1. We are having 10 computers and furnitures in the office 2. For 1 year we have not used the office at all. 3. The landlord is adding up rent for all the months 4. When we contacted him and told us about our inability to pay, and dont want to have rent accumulated. We offered to give a partial amount and cheque for remaining amount and as on that day, i requested to stop rent and allow us to vacate the office. 5. We also offered, if we can sell the system, will pay from the sales amount also. 5. He insisted in getting the partial amount, which i transferred today. 6. Now after transferring, he was replying me saying that i can only vacate when i settle full amount and until then rent has to be paid. I feel cheated, i toiled a lot to arrange this partial amount, hoping he will allow us to vacate the systems upon issuance of the cheque, and strongly believing that the rent accumulation will stop and will put a full stop for this. But now he has gone back on his words and i feel very frustrated. Amidst, he has also contacted my family, my friends, spoiling my reputation, speaking to them uncourtly words, threatening my parent that he will go to police station for once of my pending cheque, calling repeatedly when everyone is at work. I need help on how to handle this. I seriously want to close this issue. I dont want to pay a single penny as extra rent anymore to this guy and i want peace on this, and some recovery if possible. Please advise me how to take action on this and what are my options. Thanks in advance