Unnecasary suspension of services

My services started with herotel on 2 March 2023 ever since I started I have paid post usage. A month after usage. Now all of a sudden I had to pay for August and September together. So I paid for august as per normal. Now I have been suspended for september because i havent paid. I have never paid in advance to them. And all they do is tell me I am in arrears for September. Which is impossible. As I only pay at the end of the month.... countless emails. And still they suspend. Because they are right.