Wow. I agree, you should mess with the people on there, find a way to make them hang up. Like... Having a discussion talking about whether toads exist and that toads are actually frogs. Or perhaps something more creative.

Maybe OP is a boy...

Do you realize how awesome it would be to troll them? "I'm sliding off my cute pink thong, letting my manhood spring free of the lacey confines."

SO. MANY. TROLLING. POSSIBILITIES! Take advantage op this is hilarious

Pretty soon, every perv with a Verbal Abuse fetish will be calling you. If you could learn to answer your phone, "Gimme your credit card number, you disgusting worm with a tiny, vestigial prick," you'll be able to give up your day job.

Blackmail them, problem solved

Really OP! You should have went with it

Google your new number and request to take the ad down. People are obviously still finding the number somewhere. Find out where and remove it. Or, start a new business.

are you a guy or a girl?

Haha this sounds like the episode of the Big C where Sean gets the gay phone sex number :D Make like him and enjoy it, you can earn some money :)