I didn't say anything about my account name.
I previously had a bell modem on Fibe 50 with wifi network name: NetworkXYZ (not the actual name) and password: Pass123.
Then upgraded to Fibe 1.5 and received a new modem, came with default network name: Bell992 etc.
I changed the new modem network name to: NetworkABC, password: Pass999.
Then a day after I receive the confirmation email from bell that they received my old equipment, our devices started dropping and on investigation the network name had been changed to the old network name from the old modem (NetworkXYZ instead of the new NetworkABC).
The only conclusion I can draw is that whatever tech was trying to reset the old equipment now in their possession messed something up on my new hardware and tried to change it to the last saved data they had on their end, which was the old network name.
PS - there were no power outages.