@2BRicardou,

If your network was running fine for a week, I have a feeling that the device provided by your ISP is a Gateway (Modem + Router Combo). If your ISP device is broadcasting a wireless network, you may need to configure either 'Bridge Mode' or 'IP Passthrough" - Otherwise the Decos operation mode needs to be changed to AP Mode after they are set up.

The Blue Blinking Lights on your Decos mean that they are ready for setup and not yet ready to provide an internet connection - likely a result from one of your resets. From within the Deco App, you should either be able to reconfigure your network by going through the initial setup process.

You may also consider deleting the network from your Deco app before trying to configure the network again.