两句简单英文翻译

I will take on order form management since then.
以后 由我来担当贵公司的订单管理
I will take in charge of the related bussiness of your company since then以后贵公司的 相关业务由我来负责

以后由我来但当贵公司的订单管理
But after I came from your company's order management
以后贵公司的相关业务由我来负债
After your company's business related to liabilities from me

from now on, I'm duty for manage the company's order . .

I will duty for the debts of business .