Personal Provident Problem?

Hi, ive been using a loan company called Provident in the UK for around a year and a half, i normally take a SMALL loan out monthly and pay it back in 1 hit so the interest is low. However today i rang up specifically before christmas and said they couldnt keep giving me small loans because of possible money laundering, Can you tell me if this is because there just not happy with the small interest profits and are greedy wanting bigger loans or if its genuinely the company itself?