There is nothing you can do. I was warned by other forums members when I made a similar post that it's the choice between changing provider or just accepting that you can no longer play online games. They were 100% correct.
I cancelled my 1gbps contract earlier today during the time where the entire country's Virgin network was down. Having BT installed on 17th April, only 70mbps but I can't wait to actually play 2042 without packet loss and lag spikes. If it means I need to go back to the days of leaving my PC/console on overnight to download games then so be it.
Save yourself the stress of what many of us have already gone through, there literally is no hope with Virgin until they upgrade their entire network to full fibre (currently only in very few select areas), had this confirmed by the first engineer that was unable to help.
Don't setup a BQM, it just adds more stress to the whole situation. Virgin will keep saying they can help, but all they're actually doing is keeping you on the contract as long as possible before you eventually leave.
If you're still under contract, submit a complaint from your Virgin account stating you aren't receiving the service you're paying for. Ask to cancel without cost, if they refuse send the case to the ombudsman and they will sort it out for you. I'd honestly be willing to bet that a cheap 5G router deal from Three at £20 a month would be more stable and probably a lot faster than going back to BT. It's also worth checking if full fibre is/will be available in your area, as you'll then have the choice between sky/BT/vodafone etc who are all way cheaper than Virgin too... AND you get English call centres.
