Same here. Disconnection date 20th March. It did take nearly 40 mins of actual chat though, which is just VM all over.
Me: I'd like to leave, can you give me a disconnection date and start my 30 day notice, please?
Them: I'm sorry to hear that. Let's see what we can do...
Me: I've already placed an order with an Openreach FTTP provider. I'd just like to leave, thank you though.
Them... Thirty minutes of delayed replies and asking if I still need sports channels...
Me: No, really - I want to leave. Thanks.
Got there in the end! Signed up with Sky and moved the VM/O2 mobile SIM to Smarty (half the price), and it's all sorted. Goodbye crap latency and daily outages (VM confirmed no fault at my end, it's "network issues and upgrades").