Hi @Groovychick20uk you mention the data light is blue, is the ethernet light blue also? When power, data and ethernet is connected correctly you should see 3 blue lights. It could just be that they need to be paired together again.
If you have got rid of the instructions you can always download the user guide from here.
I hope that helps you out, if you are still struggling post back.
Hi @Groovychick20uk sorry for the late reply I totally forgot. So re pairing did not help? It seems strange that they would of broke after only 7 weeks. I would call bt on the number in the user guide they will be under warranty so getting them replaced should not be a problem.