Bank detailson the templates (correspondence to Russian rules)

Good afternoon ! The situation: we need to change bank details. In Russia there must be 4 lines minimum (1-Bank name, 2- BIC, 3- Correspondence account, 4 -Payment account. We have faced the following trouble: 1- there are only 3 lines available to fill with bank details. 2- changes of bank details we made (trying ourselves) didn't display properly. 3 - I assume that you did something special with that for us some years ago that's why we cant change it by ourselves. I could send print screens. Many thanks !