Still not able to change a password... Level 3 tech support can’t figure it out....

So my frustration is beyond infuriated... This is the 4th call to Comcast with an escalated level 3 to a level 4 tech support ticket and No call back saying fixed... we dumped Comcast at one address, and now have added the email account to the current account... since we need to do a password change the internet credential service has a fault, it will not allow a change due to not being on the home network, however it’s now on the new account and on “ the home network” but Comcast can’t fix it... they won’t admit it so they ignore the issue!