Customer service representatives not doing what they assure, and not being transparent with charges fees.

I need advice or someone to actually assist me with the constant either representatives not being honest and transparent. Or assuring me that they will correct my billing  issues.Then to find out they infact are not true with there words and the billing matters never got resolved as promised. Causing me to have to spend my time Being transferred  3/5 times and countless time out of my day and life explaing my billing or technical difficulties, let alone assurance claims and device replacement being told we will overnight /next day the device but it takes well over 5/8 days before I can get the phone delivered and in hand ! I had a very unpleasant 57 min with a representative who I immediately asked for a supervisor and had explained I was on hold and about to be transfered to one when the line disconnected, and that he was the 4th representative i had to speak with before the actual department was reached. the gal never called me back after she lost the call altho I had asked for a call back if the line did disconnect. I had this particular representative Jose out of The Atlanta call center employee ID # JMPTBG3. Briefly got my newest and major issue about my bills total. Att's  failure to catch these errors or follow up to correct or look into the acount charges.instead i was snarled at, dismissed immediately , interupted, argued, was refused to even have any corrections altered because there was a issue saying i have been given too many credits yet he can't clearly distinguish the reasons behind the credits I have received with the charges.  One installment  plan With 1unlimited premium acount  a esim never used opened and cancelled all same day.following hrs of being on the phone with texh support to be told i need to try other means ..within this past week another installment plan . New    device , charges for a cancelled esim since after 8 hrs of my day wasted spending money to go into my nearest att store for them to say oh the call center could have done that for you on the phone .so I left since the call center agents I tried getting to help could have further more the agent in a thick voice says no we and I mean no one is able to credit your acount.