no reply not taken serious

I'm really tired of this network provider and their poor customer service agents i asked to change my account last-month which i gave the agent details i complained not being assisted by not knowing how much my direct debit will be now i found out money still has not been taken since the 31 st i hate calling the customer service because seems i must follow up on everything or i will get unnecessary charges for some people that are *********** and do not want to do their jobs properly