Customer service or Irritation service?

The increase in competition demands the executives to bring in as many sales as they can, but the trade of information and database banks between companies has become a serious problem for the consumers. Do you get calls from your cellular service to purchase its other services? Or you get calls from insurance companies asking for a need to buy health protection? And when you ask the source from where they get your personal information, the reply is always databank! The increasing number of calls has become irritating and annoying since the timing of these calls is not appropriate always. There must be some way to fix such problems but it is still unknown as the saturation point is still an inch away.