Password

The OP is saying its the password he needs to connect to the web. Its not yet clear to me(ex Broadband Tech Support agent), whether he means the Wifi passphrase, or the DSL/Fibre connection password.

OP, I’m presuming you have

1. Correctly identified the WIFi name on the drop down selection that might include those of your neighbours.
2. That you typed in the precise WI-FI password with upper and lower cases as shown on the router. Eg DwexZ13ptuZ4.
3. That you have indeed identified the correct WI-FI password written on the router itself. Turn over on all sides just to make sure you have it.

Often it’s the most simple things that trip us up.

If you want to look at your router settings from, eg, your phone…