How to deal properly or professionally with customers that are rude and impatient?

Good customer service is important to every business; however, dealing with people isn't always easy. When you're dealing with a difficult or rude customer, here are some tips:

-Remain clam: do not allow the customer to take this away from you because it will only lead into a spitting match that will only escalate and result in dissatisfaction from both ends

-Apologize: although a customer's problems could very well be a result of their own actions, apologizing goes a long way, and you're doing it on behalf of the company

Solve the problem: remember to listen to the customer and try your best to assist him/her with their needs, even if means connecting them to a more appropriate department that can assist them with their needs

Finally, don't take it personal: remember that you do not know this individual and they do not know you. It may seem that they're upset with you; however, they're frustrated with a problem that is beyond your control. So, remember that whatever this person may say at or about you, it should be taken with a grain of salt

What I did before when I encounter a rude customer that saying that one of his grocery item is missing. I let him speak all of his concerns and thats includes his rude words. When he stop, thats the time I explain my side. Obcourse with apologetic low voice. And before I end my explanation I apologize admitting the mistake though I'm not pretty sure if I wasn't able to put the missing items on his bags. What I'm really sure is everytime I proceed to my next Customer I make sure evertyhing is perfectly settled. But Customer is Customer, and we have this saying, "Customer is always Right". Luckily, the Customer did not let me pay the price of missing items. Actually, it cost almost two thousand pesos. And I'm so thankful. Before he leave he told my superior that I am different from the other cashier who fight with the Customer.