THE WORST COMPANY EVER I've been with them for 16 years and never had issues until recently

THE WORST COMPANY EVER I've been with them for 16 years and never had issues until recently. They harass me. Call every few minutes if you don't pickup and when you hang up. I've resorted to vulgar and rude comments with no success. I'm fed up with this horrible company constantly bothering me. Can't even speak to a client without my phone ringing. Ignore the call and 5 minutes later it happens again. It's gotten to such a point my clients think I'm overworking myself, BUT IT'S NOT EVEN WORK