Poor and Declining CX Service

Outraged: been a customer with home connect since wifi fibre was first installed in my area and now deciding to leave. When they has a small cx base they were top of game now they are big us loyal cx are not cared about. An advisor could not explain billing clearly and even went to the extent of making me look like I'm a child when she spoke. Asked for a mngr and said was on a call, placed on hold and no sla to come after each few mins to say on hold. Mngr never called back uptill now. Doubt they even told their mngr as I work in a Call centre and in cx uk. I will never allow our staff to treat customers like this. I'm shopping around now does anyone know of a good provider that knows how to treat cx? Used to love home connect never had issues till now.