Caller calls 7-10 times per day.  I answered once, was told they sell drugs from India and they need your credit card.  The drugs they are selling are illegal in the U.S. For over the counter medications.  Told them we were not interested and they just keep pitching their sales, so I just hung up.  I am purchasing a device to zap these foreigners off my line for good, cannot stand them to call and call.  Have given the info to FCC but doubt they will ever do anything.  Just do not answer.