Fed up of phone calls

Block the number, or change you contact preferences.

Doesn't sound like Virgin Media.

Ask them to confirm your account number.

How about you stop answering calls from unexpected numbers.  It is not difficult to do.

Have you opted out of marketing in 'My VM'?

I've had 3 VF Arrests - every morning I wake up is a bonus.

Why should I ? ... because your behaviour is a major part of the situation.

I have the same issue with my 80+ year old father in law, he is of the generation that must answer the phone, yet daily he gets multiple scams / bank fraud attempts and they keep calling and calling because he will not stop answering the phone and speaking in many cases to robotic telephone systems or an off shore scammer.

He is >= 90% of the problem, but like you has chosen not to grasp that.

These are effectively marketing calls to try getting you on a different package. I would register your number with the Telephone Preference Service at https://www.tpsonline.org.uk/register 

This will remove your number from UK companies marketing lists (may take 28 days) & they should stop calling you. What it won't stop is scammers pretending to be Virgin Media, as 1) they are not UK based & 2) they use number spoofing software that can clone any UK number & make it look as if they are calling from the UK.