Dollar Tree

When she was checking me out I was placing the bags in the cart as she filled them, the large bag I picked up she says 'I wasn't finished with that bag' I was about to ask her to make them light due to I can't carry heavy items, I am on a cane, she then starts to raise her voice and throw her hands up saying yeah! Yeah! Alright! As if to say 'shut up' I stopped gathered myself and told her I am not a child don't you ever speak to me that way! Before she 'rudely' interrupted I was only going to ask not to make the bags heavy, like I told the manager, 'I don't disrespect people, nor will I be disrespected, especially where I spend my money. The cashier name is 'delanor'