Can I file a FIR for cheating

We had lent a machine to a prospective customer worth Rs 18 Lacs against an advance payment of Rs 8 lacs with the condition that if he will accept the machine he will make the balance payment and we will raise the invoice , however after taking the delivery he kept postponing the decision of settling it by first finding faults with the machine and getting every imaginary thing fixed free of cost and now he neither wants to return the machine nor pay up the balance amount We have a signed agreement from the customer and also the following documents Our proof of imports for the machine The fact that the machine is still reflecting in our stock Cheaters plain paper declaration that he will make the balance payment . He is not even ready to return the machine we have even offered to pay back his advance and take back the machine after them having used it for. year to make profit but he does not agree for that too. what should be the legal action to settle this fast else the value of the machine will deplete