Called twice in a row,  hanging up

Called 3 times on my cell.

Been calling several times for the last 2 days. No message, but the call were close together each day.

Calls and hangs up

Same person (sarah) calling 15 times about reducing your mortgage.  I keep telling her I don't have a mortgage, in which she says that they will remove my number from their list, but they don't.  She still keeps calling!