A stupid customer

Tell you what?
I met a stupid customer.
Alright, he is consider regular customer in Starbucks SS15,
but he like to complaint.
He can complaint everything everyday.
The maintain is lousy lah or why the toilet always do not have toilet paper lah.
Then drink the "Tall" brew coffee, wanted get in "Short" price.

Short and Tall are the sizes of cup in Starbucks.

Yesterday, he came Starbucks and complaint again.
What toilet don't have paper lah.
Then, that time was so busy, have many customers.
I did not see which customers came first, so I serve the ladies in front of my counter first.
After the ladies, a kids try to come over the stupid uncle, I knew the uncle came first.
Therefor, I said:" Sorry, is this Mr came first."
mana tahu, the uncle said:" hm, luckily you serve me first, if not, this time I will shout."

means he suppose came first than the 2 ladies.
This alright.
However, as usual, he ordered his TALL brew coffee and paid in SHORT's price.
Suddenly he wanted a Blueberry Muffin, this cost RM6.20 after tax.
I key in the Muffin into system and print out the receipt.
Then he said:" why so expensive? I never eat a Muffin cost so expensive. Last time I bought just ten something only."
You know what?
He suppose paid RM12 for Brew Coffee and Blueberry Muffin,
but he does not want to pay.
So, he just put RM10.80 on the counter, then bisik bisik.
Then look for place sit down and eat the muffin.
That day, I short my counter money because of him.

The problem was not the money. I am ok with short money.
The problem is the stupid uncle's attitude.
What the cow?
Really Annoying.