Butchery lady with an attitude

Butchery lady with a very bad attitude. Every Friday I do my shopping at Checkers N1 city, and for the past few months. I always have the same problem when at the butchery. I want to know if I as a customer have a right to search for which packet of meat, mince, sausage or chops I would like to purchase? while still busy looking an extremely rude employee stands basically on top of u watching what you are doing and packing the meat right after you leave. or even while you still there, its totally and utterly disgusting to treat customers that way! And she does it every single time I shop. I have had enough of her bad attitude and something should be done about this, I approached one of the staff members and complained about the bad service from the said lady yet she continues to do it every single time.