Just got a "notice of past due amount and potentia...

Just got a "notice of past due amount and potential legal action" from National DME. I had never heard of this company before and this was definitely the first time I've ever gotten a bill from them. The document had almost no description of what they were threatening legal action over. After jogging my memory I realized that his must have been a bill for an ankle brace I got from a doctor over 2 months ago. I also just discovered they are trying to charge me almost 2x what is being sold for multiple places online.

Of course these ratings don't matter because all they do is get a contact with the doctor office and they can charge whatever they please.