Tammy Cooney

I have issued a client a significant invoice from my Limited Company. The client is now insisting that it is paid into a personal account, even though it wasn't discussed or agreed as such. They are refusing to pay it to the Ltd Company. What are the implications of this scenario? Why might they be asking me to do this? I want to get all my ducks in a row, before I go back to them - but for the life of me, I cannot see what they would gain from this......... Thanks