What you need to do is look at all of your options and research them. It might be best to speak to someone who is familiar with all the relief options out there and who will take the time to explain each one of them in detail with you.
Be careful of who you speak to. There are quite a few companies out there that will try to pigeon hole you into what they offer even if it's not in your mother's best interest. Take the time to look at their BBB report like you did for the collection company. This is often a tell tail sign of the company.
But most of all be well informed and gather as much information before making your final decision as you can. Some companies will provide you will every thing you will need to do this. It is a company like that that I suggest you speak to.
I do have a few hubs that go over this and what to look for. You can start out by reading https://hubpages.com/money/Do-you-need-a-law-firm-... There is a lot of helpful information contained there.
I wish you and your mother the best of luck.