Hacked

It looks like the contract fell through on that house I've been trying to get rid of for the past 3 years. How do I know? I still have a phone.
You see, every time a contract is placed on the house, my phone gets hacked. Phone calls and texts get lost. My phone calls people at random. Often emergency services. My icons get placed everywhere. My phone starts providing a wireless hotspot for everyone. It's very annoying. Worse, it really doesn't do much good to fix the problems, because they reappear as fast as I can fix them.
It seems someone with a degree of technical ability and the ability to gain more information on my activities than is good for me or even legal, really doesn't want me to sell the house.