If VM presents you with a renewal offer, it is unlikely to be a very good offer and will be weighted heavily in favour of VM.
Unfortunately, the only way you are likely to get any decent kind of renewal is to haggle with a VM sales agent and maybe even put in a cancellation in the hope of a call back from VM retentions.
Here is a past topic (relatively old post now but the advice is still good advice) from Andrew-G at message #5 on some considerations when renewing.
If you are really looking at a broadband-only package for the future (and if speed is not a major consideration for you) you should start pricing up the competition as that will be the greatest bargaining lever you have against VM if you really are willing/able to cancel and leave VM.
