My parents have been receiving a lot of nuisance calls including "spoofed" calls where someone has been using their number. After looking into call blocking devices and phones, I think they would be too complicated for my parents as they are in their 90s and my Mum is hard of hearing and wants to keep her phone. They are a bit reluctant to change their number because they would have to let everyone know individually. Does Virgin provide a feature that would make people aware of their new number or would this defeat the object and allow more spam calls?
Changing landline number might help but may possibly make the situation worse. Any 'new' number will be recycled from a pool of numbers owned by VM.
There have been plenty of past examples on here of people making a number change, only to find they are still plagued by nuisance calls or have inherited a number with past business connections. It would be a lottery as to which new number you receive.
If your parents' number is still being abused for fake caller ID, then a number change might help but might also make things worse or no better. Something you should be aware of before making such a change not withstanding the inconvenience of notifying contacts of the number change.