What is the meaning of the following sentence?
Please be informed that we did not yet received the purchase order.
After the word "did" use the present form of verb.
So it must be like this:
Please be informed that we did not yet receive the purchase order.
By the way, what I can understand about this sentence is that the one who purchased an order is referring to the word "we". He/She is informing that he/she did not yet receive his/her order.