RandomMemory wroteAsking for someone here. What's the default router page login for the DSL modem (the new tp link from ogero) admin admin is not working.
Call 1515 they will give you the admin pass but wont give you the PPPOE credentials, they are giving full admin access to users now (I got subscribed to Ogero in Jan 2018) and they gave me the admin credentials without any hassle.
Once you have the admin pass you can dump the cfg, easily decrypt and get your hands on the PPPOE credentials.