Please comment on grammatical mistakes

This original invoice of HKD90,000.00 is not yet mailed to company ABC as Mr Wu has not yet confirmed the completion report since my email dated October 19, 2020.

Tel-con with Mr Wong on October 27, 2020, he mentioned Mr Wu is a new staff, and there are some defects in Remington before. He will be on leave on October 28, 2020, and will get back to me on October 29, 2020 (Thu).