My first ban was Post Cereal back around 1995 and that was over a toy prize missing in the box which customer service promised to send but didn’t. There hasn’t been a box of their cereal in this house since. If I can hold a grudge over a silly toy, well, this restroom stuff...
Sometime grudges are good things. Verizon jerked me around for years on a DSL problem so I left. Got a smaller commercial ISP who was 10 times better CS and within a short time found and fixed the problem that Verizon refused to do.
Then Verizon kept calling to get me back. I said never. And I meant it.