Problems getting on line

The Mac Book is back from the Apple Store with a new keyboard and case. I got a new router last month. What else could go wrong? The server! Virgin are down again. Couldn't get on line for 2 days last week and I have been told that it will be another three days before broadband will be restored. So I am using the mobile dongle which is dial up and is therefore slooow and subject to cutting out.