Unauthorized closing of account and phone number ported out.

After being a AT&T customer for 30 years, in January 2023 my landline phone stopped working. After calling customer service, I was told my phone account was closed (not requested) and my phone number had been ported out to Verizon (not requested). I was told by customer service that I had to call and find out why it was ported out. Verizon told me it was now with tracfone and I would have to call them. I have spent at least 10 hours on the phone with the listed companies and have had no luck. I have been switched with AT&T customer service from landline to wireless and supposed Port specialist. Each time I am told I will have to do the legwork. Several calls were just dropped and even a supervisior's call were dropped and never a recall from customer service. I cannot understand how this is my issue and no one can assist me to get back my phone number I never requested a change on. I was also told by customer service they could not help me because I did not have an account with AT&T. I did everything to try an elevate this but no assistance again. I looked up the Office of the President of AT&T and the numers listed on their website are invalid. I am left now wit BBB or a lawyer. What a shame to get no assistance after being a loyal customer for 30 years.