Name and shame the lousy customer service you've had - if you want to get it off your chest.
I'll start the ball rolling with Plusnet who have screwed up my elderly mother's phone. She was going to move late next week and it's all fallen through so we phoned them yesterday and were on hold for two hours. They have left her with a disconnected phone even though it wasn't supposed to be disconnected until next week and have done nothing to fix it. They promised it would be fixed by midnight yesterday but isn't and she's been in tears about it as she lives alone and is reliant on the phone. I've sorted out a pay as you go for her for now.
I've named and shamed on Twitter and written recorded delivery to the CEO.