Here's my rewrite of your text.
Please, move the inspection to 27 Aug, as the goods are not available today. Sorry for my late revision. I've been out on leave since last Friday and did not receive the message from the factory.
The name of document xxxx shown on the B/L was incorrect
startfrom the beginning. According to our current document, the name of the document should be xxx. So please help (to) amend it, and also enter the correct name in your system so that we don't have to request additional amendments for this document going forward.
After "help", 'to' is optional. It's more common to simply say, or write, "help" instead of "help to".
If you have any questions about what I've corrected or revised, please, ask. I'd be glad to explain.