Thats what he sent, What should I ask for? thanks
You should ask him to provide you an image that can actually be read. An image that small means he made it that way for a reason before sending it to you so it tells me he is hiding something.
An iPhone can take better screenshots than that.
Your address shows you successfully received the 0.4 BTC from him but that is it. 0.75 was not sent previously.
https://blockchain.info/address/1PYmyVML85i3d2gwjiHx4sPYyzW8XtgKmfIs there any reason it would show .75 and then have it disappear? wheter he sent it or not. Because my account 100 percent had .75 in last I checked before today. Is there a lawyer I can talk to, because I want my account balance history sent to me from blockchain, because I am pissed off
No, you cannot talk to a lawyer and that will not fix anything.
What probably happened was that the transaction was sent with a low fee such that nodes probably wouldn't relay it. Then over a few days as it remains unconfirmed due to the low fee, it is dropped from nodes' mempools so the transaction is essentially forgotten by the network. The coins would have gone back to the sender as if that transaction had never happened.