I’m assuming you activated the simcard in the hologram dashboard? Did you set the APN correctly on both devices (apn=“hologram”, no username or password). I would also leave the modems (with activated sim installed) up and running for a few hours, and see if they connect during that time. The first registration can take a while (usually less than 15 minutes, but just to be safe leave it for hours). I have seen it take longer if I turn on the modem with a simcard I haven’t activated yet and it gets rejected a few times. Maybe the tower temporarily black lists it or something.
I have a sim800L in Victoria (near Vancouver) successfully connected to Rogers:
From hologram dashboard “inspect”, some fields anonymized:
{"linkid":??????,"record_id":???????????,"session_begin":"2018-07-13 21:32:38","timestamp":"2018-07-13 21:47:27","bytes":1093,"imei":"??????????????","cellid":56423,"lac":9120,"network_name":"Rogers Communication Partnership"}
Lastly, see my post about the series of AT commands I use to setup the SIM800L HERE
Hopefully some of this helps. Sorry I cant offer much on the SIM7000A, I switched to U-Blox for LTE-M1/NB-IOT.