Credit management Related Issue

Hi,

For our client we are maintaining credit management , Take 3 customers A,B and C, We are maintaining 250000 lakhs Credit in all Credit control areas , now the issue is the company has merged with Other company (Eg Reliance). now this new company is offering 750000 lakhs credit for 3 customers here 3 customers have grouped in to same group . Where i can group 3 customers and how i have to solve this issue . Please some one help me.

Thank you,

pranay