Terrible service

For this month I only had 2 weeks of internet service and 2 weeks off ... with this being said the active 2 weeks was terrible and slow.... in this time they managed to ignore My logged call and to add to that they quick to send a message stating that early debit orders due to public holidays. ? What am I paying for when I've been buying data weekly ? When is this issue going to be resolved? This is becoming fruitless and wasteful expenditure