Telkom with its Unprofessional Employees

I purchased a property with a Telkom tower in it. Telkom together with their partner Gyroproup refuses to pay rental on it. Each time they take 2-3 weeks to respond to emails and have no interest in making means to pay. I have been sending numerous emails, they just ignore them and continue utilizing my space, which they refuse to pay for. Be careful about dealing with Telkom, they are very unreliable and *************.