Hi, friend!
By analyzing your problem description, I think there is a problem with Facebook's service connection.
I'm trying to log in to this device. You can log in to the WebUI and choose Internet > Bandwidth Control to perform related configurations.


However, according to the version number you provided, the product is customized for Egypt TEdata and has reached EOS for a long time. I am not sure whether the configuration takes effect.
For more solutions, contact ISP.
Thanks!