You need to seek professional help. The more you play with that drive the less data you will be able to recover.
Any service should charge you about $75 to analyze the drive and tell you what they may be able to get. Some even provide a list of files. Be sure you get the cost up front for the evaluation and a non-clean room restore.
They should also provide you a price based on that for recovery. A place I use generally charges about $375 for recovery like yours. If they are charging you much more, I would find another place before you even send it in for evaluation.
If the drive has to go off to a clean room for recover you may be looking at about $1800, so you need to determine just how valuable that data is to you. Being you can access the drive in some way, I highly doubt this to be needed.