How do I leave Virgin Media please?

I am sitting in my bedroom quite far away from my NEW wifi router absolutely in awe of the lightening speeds I am now getting from mobile wifi with a SIM from a cheaper provider than even the essentials 50 package I was struggling with super slow speeds with!

I went to upgrade forst to see if that would improve my speeds but I was told by VM that that is the max speed I can get in my area which is poor speed :-(

I so wanted to stay and for VM to do what they could to fix the problem but even retentions said there is nothing they can do

I have been with you for around 9 years and did not want to leave but I have to as my speeds were so poor it took me 2 hours to do a Just Eat grocery shop!

Which of course was unacceptable ( it is 'part fibre' in my area )

So switching to a new wifi router with a SIM card in it today I was apprehensive in case the speeds were still SLOW BUT I am so surprised I wish I did this years ago now!!

Lightening fast speeds even upstairs and a super strong signal for LESS than on the Essentials plan

So HOW do I cancel my Virgin Media ASAP as from tonight I will not need it at all

Thanks - I wanted to do it online if possible?

The essentials plan is a monthly plan so I can leave at any time thankfully?

I was so hoping you could do something but you can't , sadly , so I want to cancel ASAP so I do not get charged too much in the last month

Thanks