I had the same email on 9th Feb.
I've had nothing but trouble with Netflix since joining VM mid last year. Netflix works for a few weeks then "an error" comes up asking to restart subscription, IT form raised, works for a couple of weeks - and repeat.... It only started working again last time on 2nd Feb!
So far raised a VM complaint on the 9th/Feb which only told me to talk to customer service.
Called Customer service 21st Feb and they raised said an IT ticket had been raised automatically on the 9th and I should wait a few days! They promised a Mgr would call be back in 4hrs... still waiting.
Called again last night for another IT Ticket to be raised and a "Netflix form" but I'm not holding my breath on a quick fix!