I rent tents for holding memorial

Q: I work in a company which imports sheets, covers, mattresses and such things from foreign countries, such as Korea and Spain. In order to do this, they follow certain procedures, such as dealing with usurious banks which add interest to the overdrawn account. They open current accounts in those banks, but sometimes the account is overdrawn, so the bank adds interest to it, and the company pays this interest. The company also has insurance with insurance companies on the imported goods which are placed in the depository, and the company cars. The company also opens a letter of credit and a letter of guarantee at the banks mentioned above, and the bank benefits from the commission. (Part No. 15; Page No. 16) I would like to inquire about the following: First, I work for this company as an auditor. Together with two colleagues, I register all the transactions made by the company in a ledger, in addition to the following procedure: going to these banks to deposit the financial returns in the current accounts, and following the procedure of opening letters of credit, including contacting the insurance company agent to insure the goods, cars and the depository. We also settle the closing account and set the company's budget. While doing this, we register the interest calculated by the bank which is due on the company because of the overdrawn credit, in addition to recording the insurance installments in documents. What shall I do? Shall I record the bank interest and the insurance installments in documents, and call the insurance company agent to insure the goods and the depository? Shall I go to the bank to open letters of credit? I asked one of my former colleagues about this interest, and he told me that he had spoken with the business owner, and he gave him worldly excuses. Please advise, and guide me to what pleases Allah.