Citi has a robo caller that calls my home number XXXX times per day. Trying to collect from someone that has n't lived here in over 5 years. 
The robo caller has no option for me to inform them that they are calling the wrong number. 
This occured two months ago, and I contacted a manager at Citi customer service and informed them that the person they were looking for does not live here. The manager informed me that they would stop calling. 
