Which one is more appropriate and grammatically correct?

As we started the work at the site, please ask the supplier to deliver and install the items at the earliest. Initially, we were informed that they will arrange for the delivery and installation of items upon our request.

As we have already started the work on the site, please ask the supplier to deliver and install the items at the earliest. Initially, we were informed that they will arrange for the delivery and installation of items upon our request.