I had someone do some maintenance on two things at my home. They fixed one, and not the other. I called him about 2 mins after he left to inform him. He said not to worry, he would have it fixed another day (was the owner of the company). Total price was $230. The owner had his secretaries call me twice after that demanding payment. I said I would pay him when other item was fixed. Haven't heard from them for a couple of months. They rang me today and I missed the call on my mobile and home phone. After that they kept giving me prank phonecalls, would let home phone ring a couple of times and hang up. They wouldn't answer when I tried calling them. I eventually got onto them by using someone elses mobile. I'm a bit creeped out. Not sure whether to pay them for half of the job and tell them not to worry about other? Any advice??