WoW, First call after mailing out letters

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I just got my first call today after mailing about 200 letters and she called me a little SH&! and said she was reporting me to the local real estate ethics boards and the better business borough for predatory practices. Can she do this or should i get use to these types of calls. It kind of put a chill down my spine. It went into my voicemail so I was lucky not to talk to this classy lady.

Thank's

Shawn