Don't bother reading about federal law and your rights through official links already provided. Just keep thumbing your mobile phone and spewing illiterate "confused victim" posts like a good company shill .... and send them someplace else.
For those genuinely interested in not playing the victim, that handy FDCPA gives you the right to a quieter phone, fair treatment, and proof of a debt claim if you use it correctly. It also lets you sue offending companies on their dime if the consumer wins. Losing agencies typically pay a damage award plus all legal costs.
Kentwood Law Group / Susan Addison Blush, P.C. / Pinnacle Litigation Group is known to seriously violate laws and disrupt comment sites like this with deceptive remarks. If they come for your money, take theirs instead by turning state and federal law against them.