Originally virgin (my telephone provider) said that they could not block this number from contacting me. However, after speeking to OFCOM, I called Virgin back, mentioning that OFCOM said they should be able to do this. Virgin said they couldn't do this, so I persisted saying Ofcom said they can even though it might not be a standard feature which they offer. I was given a nuisance calls number for Virgin: 0800 9533333 - which I called. I kept mentioning OFCOM and that they said they can block the number for me. The woman I was speeking to said they would block this number from calling me, which could take up to 72 hours to activate. She said she would also trace the provider of this number and take the issue up with them and also trace the real number that is making these calls (behind the 02031035180 number).
In my previous post I said OFCOM provides this number.
That is incorrect, OFCOM are independant regulators.
Anyhow, anyone with VIRGIN, you CAN BLOCK this number from calling you. Just call the 08009533333 number and persist. And it is free to do! Give OFCOM a call too. Stand and unite, we can take these punks down :)