Unless you were a minor at the time of the settlement you may not be able to pursue the at fault parties. If you were a minor any release would not be binding and you could bring the action within 3 years of you attaining legal age. With regard to the attorney I would have to agree with a previous response directing you to speak with a local legal malpractice attorney.
It is possible that you have a claim against the gas station. However, it is really going to depend on the facts. This might be a premises liability type claim and therefore an analysis would have to be made as to how the spill occurred and how long it was there. You really need to find an attorney that will sit down with you and review the evidence to see if you have a claim. You would need to bring in your policy to determine whether you have medical payment coverage as well as all the photos.
It is quite common for an insurance carrier in a workers' compensation case to deny certain referrals. I am not saying it is right only that it does occur. As you case has been denied it would not be uncommon for all treatment to be denied. It is not up to you to take the action to prove that you are entitled to the care and treatment prescribed. If will most likely be necessary to file an application for hearing to obtain benefits including medical benefits.
You should discuss this with your attorney. There is a lot that can be done to get you Grover Meds. I would not give up on your attorney yet. Discussing it with your attorney will not affect your claim if you have one. Good luck.
You might also have a claim against the MRI facility. That facility has a duty to take proper care that patients do not fall off the lift. You should immediately get reexamined to determine whether you have suffered an additional injury. As you already have a doctor that saw you immediately prior to the fall you should return to that doctor as soon as possible. I would also make sure the fall at the MRI facility is properly documented.
It is hard to determine what a fair offer might be with the limited facts. I would certainly suggest discussing your injuries and claim with an attorney before you enter into any agreements. Also be advised that you should not settle with a liability carrier until you determine the extent of your under insured motorist coverage and obtain consent from such carrier. Finally you need to be aware of the statute of limitations. I would suggest calling a local attorney and reviewing your case...
As you were most likely on travel status you have a workers' compensation claim which could provide for all the damages you are seeking. As you seem to be from Colorado you should consult a Colorado Workers' Compensation Attorney right away. As for any other type of civil liability it might be difficult to collect anything from the party that injured you. Good luck.
You should be able to expect a call back from your attorney in less than 30 days. I make it a priority to return my client's calls in one day. I note that you posted this question in the Workers' Compensation area but state it is personal injury. If you were acting on behalf of your employer at the time of the accident it may very well also be a workers' compensation case. I sorry you are having difficulty with your attorney and if I can ever be of assistance please do not hesitate to call.