Rude employee

Dont know if this is the correct place to complain about the employee that wears an oxygen tank at the Walmart store in Bernalillo NM but I hope this gets to someone how can do something about this matter.  My friend was waiting for me in the Subway in Walmart in Bernalillo NM waiting for me to pick her up, when I got there I saw her, went into the Subway and sat down but before I did that I do admit to pushing what I thought to be an onion and about 3 or 4 crumbs on the floor.  my friend DID NOT eat her nor did I the mess on the floor was there before even she got there. I sat down for a short while across from her and this rude employee came over accusing me of pushing all of our crumbs onto the floor and my friend for sitting there to long, although we were both told by other employees that it was fine to sit in the Subway as long as the restaurant did not have an overabundance of patrons.  The employee and I did exchange some not so nice words and I do apologize for that but I don’t think he had any right to be so accusatory as we did not do anything wrong.  I would appreciate it if you would look into this matter for me.  Thank You Cindy Bond  wildnagels102158@gmail.com