Telecommunication company not vacating land of installed tower

Dear Sir, One reputed telecom company entered into agreement with me for my land and installed tower there. for 6 years they paid rent without any default. For last 1 year no rent has been paid. On enquiry , by phone from our side, it came to know that recently company merged business with other telecom operator and shut their tower. Upon our follow up, they have Sent us notice that agreement is being terminated and served me 1 month notice. we are okay and accepted the termination. However, company is not vacating the land and tower remains installed there. They have sent us an Fake and Fraudulent notice that we are not allowing them to withdraw their tower from the land. Whereas we are not residing at the tower land, neither we are residing in that district. There is no one objecting from our side to remove their material. we even do not go to that land even in last 7 years as rent was coming regularly and we are staying in our profession at other district. Definitely company is trying to escape from its responsibility as their business has merged with other company. We are not desirous of any arrear rent and no further agrreeement. we want peaceful vacation of the premises.