Here's a bit of a follow-up. VM called me back, and told me what happened was that my phone got disconnected, because they thought I didn't want their phone after all. Now here is why I think that happened....
When I originally applied, I did it online. You get a message which says that you will be contacted asap. Nothing happening, so the end of the week I called them, asking what was going on. The guy said something went wrong with credit-check and he would run with me through the details again. Gave my debitcard number, check, all ok. Modem would be send which I would install myself, technician would come in on Thursday to install the phone.
Fine with me. Monday the modem arrived, but I was out, so could only pick it up the next day. Tuesdaymorning, mobile rings "hi, this is virgin tech, I am at your house and you are not there". I said "strange, expected you Thursday, but come one in". He came to install phone and modem. Checked his work order, name & order & contactnumber where mine, except wrong housenumber. So I let him install the lot. Everything was working so he left.
Thursday I wasn't home, but apparently the techies have been at my door, again. This I was told the week after, when someone called to ask whether I wanted to go ahead with the installation. I explained everything was installed already, and that they had shown-up for nought. "OK, the I will cancel the order". "Fine", I said.
A month later VM called. They asked me if I still wanted the phone installed. I said that I already had a phone of them. He asked (you won't believe this) "Are you sure it is a phone from us?"

So I told him what happened before, and he asked if he should cancel the order, which I said "yes".
Two months later the phone then finally got disconnected.
Now where I think things went wrong, was with the actual order. I triple-checked that everything was ok, housenumber and the lot, before I send my onlne application away. Now I have the vague feeling the customer-service entered the wrong housenumber, which created a second order. So, now I have twice the same package of them, and they charge me twice. Except, one is for the neighbours (I think).
They would investigate this, and call me back, but I gave them up till today. Probably won't hear from them over the weekend, so I'll have to call them on Monday.
The moral: order only once, and do NOT fill in the details again with them via the phone. You are warned!!!!!