Bad customer service and no connection to internet after paying

It's been a month nth I paid but I'm not connected to the internet. I have to buy data but I paid. I asked to be connected or reimbursed but no response. Today the router stated flashing a red light I don't know why. I need internet and I don't understand why you want me to pay for December when I paid for November but never used the internet. The service of pluxnet is not good