Fed up with receiving repeated telephone calls asking for charity donations? Ever wondered why you keep getting called despite saying no? How did they get your number? Dispatches goes undercover to find the answers and reveal the secrets of the telephone fundraising call centres. Telephone fundraising has helped charities raise huge sums of money with an estimated £2 billion amassed for good causes. However, this comes at a cost as some of Britain's biggest charities are paying private companies to raise money on their behalf. Reporter Seyi Rhodes examines the increasing number of complaints made by the public about this method of fundraising. Inside the call centres, Dispatches' undercover reporters discover a sales driven culture where some workers are pressured daily to meet targets and donors are squeezed hard for their money.