What’s the difference between subsequent and aftermath?

Hello everyone! I am totally new in this app. I am so disappointing for their service. I booked one trial session with teacher Gemma but suddenly she cancelled the class . I again booked then she cancelled again. After that I was trying to book with another person but they charge me again. My question is where is 5 dollar gone? I emailed them regarding this issue. Why they showed I need to pay again if I want new class. I don’t have any issue to pay .but i already paid 5 dollar but no one is there to help this problem. I am happy to pay extra money. I don’t know how do they manage their app. There is no phone number to contact with them. There is just only robotic auto reply coming. Just ridiculous service. I already emailed them service centre still no reply. Here is the proof of my payment. I don’t know is it right place to talk about this matter . Just sharing if anyone faces the same issue. I already send text to that teacher Gemma but she didn’t reply anything. I will wait till tomorrow then I will take further action. It’s not about money , it’s about their wrong communication and misguided other person also wasting their time.

What is the difference between urgent and prompt? Subsequent and aftermath?

Good afternoon! Tell me, please, what are the most important rules of politeness and etiquette in English-speaking countries?🧏‍♂️

I want to make friends

Greetings everyone! Would someone explain me how I can to know the difference between the native colocation of the negation the verb "to have"? I know that "to have" means (haber-tener) but what is the difference between. "Don't have" and "haven't? Because I have seen both ways in negative sentence and questions. There is some difference? I am grateful for your helps.

Hi! Could you check the attached picture? There is a phrase "According to the ... concerned", I wonder if the word "concerned" can be replaced by another word, or is it a fixed collocation? To write that sentence by myself, I actually used "It was said that....", is it equivalent to "According to the record concerned"? I guess no😨 "record" seems plays a complementary part in that sentence?🙏🙏🙏

Can someone tell me what Chinese dialect this is?

Demand & Require What is the difference?