Quiz for today: Particles!

Feel free to book a class, I'm always happe to see you!

today my boss sent me a message, asking me to buy some Tin foil online. I bought one but then I saw he asked me to buy five. I called the owner of the shop, asking him I ordered one but actually I need five. he asked me to add him on WeChat and pay him on WeChat. the price that he said on WeChat is 13 Yuan per roll, but I only paid nine for the first one. Since I don't buy things for years, I am not very aware of the payment. And it's difficult to say no or negotiate. then I called the customer service, he said that I shouldn't be lured to pay the seller without the platform. but as long as it happened, the platform will give me 10 yuan back.

I'm very sorry. I don't know why. I didn't get any notifications. We can try it next week. Thank you.

How to improve my English speaking to be more natural and fluent? Anyone can help me, I can help you learn Mandarin. Millions thanks!