Repeated calls throughout a day.

I had 6 calls from this company in on afternoon and decided I'd had enough. So the last call I let go through and blasted them with a whistle and hung up. The rep called back and call me a f***ker  etc, so I hung up again. The rep then called back twice more until I faked being a child or a confused elder. I then hung up.
This company leaves me copious messages on my machine and I have asked them to stop call on numerous occasions.  Enough already!!!!!!!