Already activated new modem?

Tried to activate modem from apartment, was unable to activate. Retrieved a new modem from Xfinity for my apartment. Tried to activate new modem, waited 20 minutes 2 times to activate, both resulting in failure. Tried to activate again, received an error saying I already activated. Yet, there’s no wifi. Amber light blinking. The Xfinity app doesn’t show any wifi changes, only to activate gateway.

Also, Xfinity says I now have 2 gateways. But one was traded in and the new one does not work. $100 technician fee.

Tried to work it out with Xfinity Chat and Customer Service. Xfinity Chat bot told me to wait, an hour passed and nothing. Xfinity Chat agent told me they will activate my gateway and I will receive signal in an hour, it’s way past an hour. Customer service line for old modem told me to trade it in. Customer service line for the new modem told me that I should not have traded it in and that I should get a technician.

All customer service, in person and through the phone, kept asking me to upgrade my phone line in the end. 

Will I be charged for both gateways, when one was traded in, and the other one doesn’t work?