Thank you for the information, however, I don't see where you have asked a question. In the interest of time, I will try to anticipate what your question might be and if you have a different one, please feel free to ask it in a follow up reply to my answer. If you are asking if you have any legal recourse for this unfortunate poor service by these store employees, then the answer is likely not. Poor, unprofessional service such as you described is not generally illegal. There are certainly options to report this to management and/or Corporate Headquarters that could result in a top down look at how this store delivers customer service and perhaps discipline against these employees, but that would be the limit of your options since, as I understand it, you received your refund.
The statement by the employee about you was definitely unprofessional but isn't really a statement that would rise to the level of defamation of character in a way that you could sue for that. Not only would her statements have to be completely false statements of fact versus her honest opinion, but your reputation would have had to be damaged. Then, even if that could be established, there would have to be some real tangibles measurable damages.
You certainly always have a right to sit down with a local personal injury attorney to discuss this chain of events, but they will likely tell you the same thing I have. This is one of those situations that just poor business and management and the most effective way to pursue it is to file a complaint with the Store General Manager and/or Corp. Hdqtrs. If they do not seem responsive, then you take your business elsewhere. I generally don't give a store a second chance to be rude to me and always just go elsewhere with my business.
Please feel free to ask for clarification if needed. I will be away from my computer for most of the day but will answer you as soon as I am available. If no further assistance is needed, then if you could take a moment to leave a positive rating in the box above, I will receive credit for assisting you today. Thank you and Happy Holidays!