Want to online chat with support

Hello,
I did switch to At&T prepaid unlimited plan and I am trying to stop the services at this time. I have tried to cancel the plan online but I realized that I did not set up an account on AT&T prepaid website. When I try to sign up on the prepaid website it asks for a one-time passcode that is sent to my phone number and I am currently overseas and the SIM card does not work where I am. Please help me cancel the services for the upcoming months. Thank you

I lost my att phone

maybe stolen

how do I reach someone to locate it or check to see usage 

I have no phone and don’t have sign in info but have phone number and ss#

I need online chat too 

my att phone is lost maybe stolen 

I need info

I will like to now how much your plan is 

I really should have checked the Forums before wasting time since yesterday trying to get to Chat online.  I had  no idea how long (years, apparently) this has been going on.  

Forcing elderly, disabled people to go to a brick-and-mortar during a pandemic, to ask a question or TRY to resolve a problem, will not be forgotten.  I have encountered a handful of helpful people on the phone, but most are unhelpful and nasty, and it has cost me weeks of time on hold with all the disconnections and stupidity described by others.  And without phone service at all (as at present) for days on end, even the repeated frustrating TRYING to call and reach someone with a brain is impossible.  NEVER FORGET!  

You can go to the store front and ask for curbside.