Been Off line for 5 Months

I had Trooli cable for 5 months and the installer wants big money to set up the wifi dongle up to the new provider.
I have finally got from my provider a split wifi name and assures me that its currently running WPA2 @2.4GHz.
But using the app from givenergy will not log to the wifi. Then to go back and start again, I have to remove the app, then reload it back to my phone and start again. A very painful mentally process.
Any ony other way I can reset the dongle would be appreciated!

What equipment do you have? Ignoring the app and logging on to the dongle via a web browser after you have connected to its own internal access point is generally the most reliable. It will normally start with a W but the second character depends on the generation and type of equipment.