To be fair your initial post does suggest you are surprised by the increase, i.e. posting the amounts due and highlighting them in bold.
Anyhow, VM appear to me to be very open about contacting them. There are warnings on their main website as well as at the top of every page of this forum. Is that not enough?
As for the text service, this is genuine. If you bother to search this forum you will find plenty of members and reassigned engineers giving the number out. However NHS staff, the elderly and vulnerable are being prioritised so you will have to wait.
The bold highlighting was a copy and paste from the Virgin media email. I thought it was good communication by VM as they were clear about how much I was paying, and what the new amount would be.
I did try the text service to no joy last night.
I tried the phone number 150 just now and after navigating the options and holding for a very reasonable 20 minutes, as I was descaling my shower, I got through to a very pleasant and helpful northern lass who was able to look quickly look at my account (I had validated my password successfully using the keypad)
She was able to recontract my package for the same amount + RPI (which I regard as very fair)
FWIW I'm now very happy with my package, the service and the price. I have never once regretted switching to VM from BT in the 4 years I've been with VM. My nextdoor neighbour he too switched to VM and he too is happy with the price, service and overall package.
Best answer would have been. If you need to recontract - call 150 early in the day from your VM landline or 0345 454 1111 and Press 1 tv. broadband home phone, Press 1 for phoning from account telephone Press 4 changes to package Press 4 thinking about leaving Press 2 leaving password check wait to speak to agent
Now put call on speaker and get on with bathroom clean