Pre-Contract documents -is this a scam?

My 18- month contract ends in September and like many others have had a bundle of new offer emails to consider as VM mistakenly thinks my contract ends in May. I ignore them having read in other posts that this is a result of an administrative error by VM. Simple - I just delete the emails immediately.

Now, today I received another one quickly followed by one titled VM pre-contract documents - I assume to confirm acceptance of one of these offers. How come? I haven’t even opened these emails to consider any offer as I understand these were erroneously sent out. And my contracts doesn’t run out for another four months?

This is now really pissing me off.   So, why do I get an email containing pre-contract documents? Presumably for an offer I had not even seen, accepted or looked at online? 

So, is all this a scam? Or VM marketing policy to offer renewal offers 4-5 months before renewal? I have been a customer for 26 years and ridden the ups and downs ok so far. But this may just swing the balance come September .